Bitcoin is a digital currency that was introduced in 2009 by pseudonymous developer Satoshi Nakamoto, it may be a programmer or a group of programmers who created this electronic money. Since it is a digital money, they are not printed or physically they do not exist but are generated through computer programs.
This electronic money is not regulated by any government or banks, in short, they do not have any central authority to control it and so the transactions made with ビットコイン are peer to peer and do not have any intermediate services to transact them. This made transactions instantaneous and it will take only a few seconds to complete transactions.
People involved in each transaction are kept anonymous and their identity will not be identified by anyone. Only their public address is visible and with that address no one can find out that it is you who has made the transactions. But it is recommended to change your bitcoin address regularity in order to avoid hacking. also you should not share your private key to anyone.
These currencies do not have any restriction and can be used across any borders and there will b no extra fees for each transaction. Since there is only limited number of bitcoins in the world, their value has been increasing continuously and drastically in the recent years. One can acquire this digital money in numerous ways and some of them include buying them in exchange of normal currencies, playing online games and more.