Bitcoin is just one type of cryptocurrency, a form of digital asset or money that can be exchanged in a similar way to normal currency. There's no physical money attached to a cryptocurrency, so there are no coins or notes, only a digital record of the transaction.
So anyway, why are Bitcoins limited to 21 million?
Many believe that Bitcoin's 21 million limit was arbitrarily set when Nakamoto made two key decisions, that: Bitcoin should add new blocks its blockchain every 10 minutes (on average); and the reward paid to miners (starting with 50 BTC) halves every four years.
For good measure, is Bitcoin backed by the government? Cryptocurrencies aren't backed by a government. Cryptocurrencies are not insured by the government like U.S. bank deposits are. This means that cryptocurrency stored online does not have the same protections as money in a bank account.
In a general, who controls the Bitcoin?
Nobody owns the Bitcoin network much like no one owns the technology behind email. Bitcoin is controlled by all Bitcoin users around the world. While developers are improving the software, they can't force a change in the Bitcoin protocol because all users are free to choose what software and version they use.
How is bitcoin supply controlled?
The monetary base is controlled by a central bank. In the United States, the Fed increases the monetary base by issuing currency, increasing the amount banks have on reserve or by a process called Quantitative Easing. ... The Bitcoin generation algorithm defines, in advance, how currency will be created and at what rate.