更新1:
@Anonymous, in a nuthshell a Bitcoin is a type of "token" that you can buy with real money. There only 21 million possible Bitcoins in existence, therefore it VERY limited and CANNOT be duplicated or counterfeited. So far as of 2021, there have been about 19 million Bitcoins that have been mined through years and years of powerful computers. Bitcoin is called cryptocurrency because it has NO central bank like the dollar or Euro money, therefore you can buy a lot of drugs online in the Dark Web.