After I read from a number of trusted sources and it turns out I get information, if the total number of bitcoins in circulation is 21,000,000. but if demand continues to increase, this number will be added again.
and the My question is very simple ...
Who will increase the amount of bitcoin, if then the demand increases ??
Did they Is make this bitcoin, actually ??
Can you please provide the link of where you got that trusted source and information. I assume you misunderstood what you've read. The 21,000,000 is not the circulation, it's the maximum supply cap. that means only 21 million bitcoins can be mine in total. Currently, total number of bitcoin circulation is 18.5 million so that means we they only have 2.5 million left to mine. Some articles also include that because people have lost their private keys or have died without leaving their private key instructions to anybody, the actual amount of available bitcoin in circulation could actually be millions less.