Bitcoin can disappear?
And if bitcoin is a scam, what will happen in world?
People will panic?
No bitcoin can not disappear because bitcoin have strong enough and have many people invest in bitcoin and become popular in the whole world.
If bitcoin get scam many people are crying because investor are a big holders of bitcoin. If that happen those people invest in bitcoin will panic.
Good ! Bitcoin cannot disappear but it can be hacked or stolen,it is advisable you keep your private keys in a very safe place including your other wallet details. By been carefully that way no amount of bitcoin will disappear from your wallet.
There is a difference between bitcoin losing its value and bitcoin being gone. I think if we talk about the price, that's not impossible, price could drop like other altcoins, but it is hard to happen and we don't wish that it will happen, but bitcoin to be gone, no, that's impossible.