As I mentioned earlier, Bitcoin is not like a typical currency that you keep in your bank. You are responsible for the security of your Bitcoins and that’s why you keep it in a wallet that you have 100% control over. This is done by having the ownership of seed word or private key.  For the first timer, it may sound very technical, but it is actually easy to understand and learn.
2.) Pseudonymous: Neither transactions or accounts are connected to real-world identities. You receive Bitcoins on so-called addresses, which are randomly seeming chains of around 30 characters. While it is usually possible to analyze the transaction flow, it is not necessarily possible to connect the real world identity of users with those addresses.
Voting with blockchain carries the potential to eliminate election fraud and boost voter turnout, as was tested in the November 2018 midterm elections in West Virginia. Each vote would be stored as a block on the blockchain, making them nearly impossible to tamper with. The blockchain protocol would also maintain transparency in the electoral process, reducing the personnel needed to conduct an election, and provide officials with instant results.
According to the European Central Bank, the decentralization of money offered by bitcoin has its theoretical roots in the Austrian school of economics, especially with Friedrich von Hayek in his book Denationalisation of Money: The Argument Refined,[121] in which he advocates a complete free market in the production, distribution and management of money to end the monopoly of central banks.[122]:22
Every 2,016 blocks (approximately 14 days at roughly 10 min per block), the difficulty target is adjusted based on the network's recent performance, with the aim of keeping the average time between new blocks at ten minutes. In this way the system automatically adapts to the total amount of mining power on the network.[3]:ch. 8 Between 1 March 2014 and 1 March 2015, the average number of nonces miners had to try before creating a new block increased from 16.4 quintillion to 200.5 quintillion.[84]
Bitcoin, along with other cryptocurrencies, has been identified as an economic bubble by at least eight Nobel Memorial Prize in Economic Sciences laureates, including Robert Shiller,[189] Joseph Stiglitz,[190] and Richard Thaler.[191][13] Noted Keyensian economist Paul Krugman wrote in his New York Times column criticizing bitcoin, calling it a bubble and a fraud;[192] and professor Nouriel Roubini of New York University called bitcoin the "mother of all bubbles."[193] Central bankers, including former Federal Reserve Chairman Alan Greenspan,[194] investors such as Warren Buffett,[195][196] and George Soros[197] have stated similar views, as have business executives such as Jamie Dimon and Jack Ma.[198]
In Charles Stross' 2013 science fiction novel, Neptune's Brood, the universal interstellar payment system is known as "bitcoin" and operates using cryptography.[227] Stross later blogged that the reference was intentional, saying "I wrote Neptune's Brood in 2011. Bitcoin was obscure back then, and I figured had just enough name recognition to be a useful term for an interstellar currency: it'd clue people in that it was a networked digital currency."[228]

Exchange hacks. As stated above, an exchange hack has nothing to do with the integrity of the Bitcoin system… but the market freaks out regardless. This trend seems to minimize as users see that cryptos recover from exchange hacks. As exchanges evolve and become more secure, this threat becomes less of an issue. Additionally, outside investments funneling into exchanges are providing the capital for them to grow stronger.
Blockchain is a technology that allows individuals and companies to make instantaneous transactions on a network without any middlemen (like banks). Transactions made on blockchain are completely secure, and, by function of blockchain technology, are kept as a record of what happened. Strong computer codes ensure that no record of a transaction on blockchain can be altered after the fact.
Once a transaction is recorded, its authenticity must be verified by the blockchain network. Thousands or even millions of computers on the blockchain rush to confirm that the details of the purchase are correct. After a computer has validated the transaction, it is added to the blockchain in the form of a block. Each block on the blockchain contains its own unique hash, along with the unique hash of the block before it. When the information on a block is edited in any way, that block’s hash code changes — however, the hash code on the block after it would not. This discrepancy makes it extremely difficult for information on the blockchain to be changed without notice.
Disclaimer: Investing in cryptocurrencies and Initial Coin Offerings ("ICOs") is highly risky and speculative, and this article is not a recommendation by Investopedia or the writer to invest in cryptocurrencies or ICOs. Since each individual's situation is unique, a qualified professional should always be consulted before making any financial decisions. Investopediamakes no representations or warranties as to the accuracy or timeliness of the information contained herein. As of the date this article was written, the author owns less than 1 BTC, and no positions in any of the other companies mentioned in this piece. Investopedia does not make recommendations about particular stocks. 
The incredibly low-cost days of mining bitcoin, which only lasted a couple years, were days where one bitcoin was so cheap that it financially made sense to mine them at a very low cost instead of buying them. For context, the first exchange rate given to bitcoin was in October 2009, 10 months after the first block was mined. The rate, established by the now-defunct New Liberty Standard exchange, gave the value of a bitcoin at US $1=1309.03 BTC. It was calculated using an equation that includes the cost of electricity to run a computer that generated bitcoins. This was the period of time where bitcoins, which were looked at as little more than a newly created internet novelty, could be mined in large quantities using an average computer.

Bitcoin is the most secure and robust cryptocurrency in the world, currently finding its way across the world of business and finance. Bitcoin was thought of as Internet money in its early beginnings. Unlike fiat currencies Bitcoin is a decentralized currency. That means that a network of users control and verify transactions instead of a central authority like a bank or a government.
You want to make sure people with bitcoin accounts can find you and spend their bitcoins on your site. You can apply to a variety of online directories designed for bitcoin users. Simply follow the application instructions on the directory websites. You can also download and display the bitcoin logo on your website to signal to users that you accept bitcoins as payment.[20]

Whenever referring to the price of Bitcoin as it relates to fiat currency, the price being discussed is almost certainly an aggregate average of the price across various exchanges’ order books. Because bids and asks are instructions executed at a certain price, a large market buy would fill through several orders at incremental price levels and subsequently move the price of bitcoin up or down.
Wallets and similar software technically handle all bitcoins as equivalent, establishing the basic level of fungibility. Researchers have pointed out that the history of each bitcoin is registered and publicly available in the blockchain ledger, and that some users may refuse to accept bitcoins coming from controversial transactions, which would harm bitcoin's fungibility.[118]
The average price of a bitcoin can increase and decrease unpredictably. For example, in one week in November, 2015 Bitcoin went from $318 on a Monday to $492 on a Wednesday, falling back under $400 by Thursday.[14] Do not put too much money into bitcoin, as it's seen as a high-risk asset. Only buy enough bitcoins to make convenient online purchases.[15]

The peer-to-peer network structure in cryptocurrencies is structured according to the consensus mechanism that they are utilizing. For cryptos like Bitcoin and Ethereum which uses a normal proof-of-work consensus mechanism (Ethereum will eventually move on to Proof of Stake), all the nodes have the same privilege. The idea is to create an egalitarian network. The nodes are not given any special privileges, however, their functions and degree of participation may differ. There is no centralized server/entity, nor is there any hierarchy. It is a flat topology.
The blockchain protocol discourages the existence of multiple blockchains through a process called “consensus.” In the presence of multiple, differing copies of the blockchain, the consensus protocol will adopt the longest chain available. More users on a blockchain means that blocks can be added to the end of the chain quicker. By that logic, the blockchain of record will always be the one that the most users trust. The consensus protocol is one of blockchain technology’s greatest strengths, but also allows for one of its greatest weaknesses.

If the private key is lost, the bitcoin network will not recognize any other evidence of ownership;[31] the coins are then unusable, and effectively lost. For example, in 2013 one user claimed to have lost 7,500 bitcoins, worth $7.5 million at the time, when he accidentally discarded a hard drive containing his private key.[76] A backup of his key(s) would have prevented this.
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