The amount of bitcoin in circulation at this time is very limited, as time goes by the number of bitcoin will continue to decrease one of them because if some people have lots of bitcoin in their offline wallets and they die or lose memory. As a virtual currency, bitcoins are encapsulated in the form of digital files or known as wallet files. But wallet files stored on hard disk electronic equipment are very vulnerable to damage. In addition, viruses that attack the hard disk can also make stored bitcoins just disappear.

The digital wallet can also be hacked and stolen through malware. and the more painful is if we lose the bitcoin because of those, certainly the bitcoin will never come back to us.