Bitcoin will be around for the rest of our lives, so to be honest this question is somewhat irrelevant. Unless some super-secret quantum computer suddenly unleashes a vicious attack, bitcoin will be safe - and even then it can be forked. Bitcoin won't die.
Or maybe we'll have a new kind of money, better than crypto
Like, you won't need Internet to make a transaction: just by thinking about it, you'll be able to send money!
