In my opinion, cryptocurrency or digital currencies like Bitcoin have spread all over the world and can not be stopped.

Internet and bitcoin can not be separated, meaning Bitcoin transactions will not be lost while there is internet or if want to destroy Bitcoin in the world, then remove all the internet.

Basically, bitcoin is divided into the smallest unit of 0.00000001. If it turns out that some of the missing coins are mostly due to user negligence to his private key, then that would not be a problem in Bitcoin. And it's not a problem and bitcoin as currency. Because because with the loss of the coin, it will push the value of another coin to rise. It's hard enough to tell which coin is really missing, or that the coin has moved on someone else's wallet. Quite difficult to distinguish it. The meaning of the coin turned out to have moved on another wallet, is due to negligence of the owner so that a number of bitcoin that can be taken by others.

So the point is that bitcoin will not disappear in this world, because there are still many people who want to invest money in bitcoin.