Avoiding the debate of whether there are any widespread real-world usage for cryptocurrencies, is it possible that cryptocurrency is valuable (and has long-term staying power) simply because the ecosystem surrounding it is so much fun for a non-negligible swath of people?
I know this sounds ridiculous. But hear me out. The entire process of setting up exchange accounts, reading about alternative coins, jumping into the drama, worrying about massive gains or losses, buying hardware wallets, chatting with others doing the same thing, thinking about complex systems and new coins, etc. is a lot of fun.
Could it be that cryptocurrencies are somewhat of a 'simulation currency trading market' that just so happens to allow you to cash in and cash out with fiat currency?
I have little doubt that the current value of BTC and other coins will blow up in the future, and if you've got anything more than disposable income invested in it, you'll probably get burnt really bad. I think it's almost a given. But I suspect that the idea of cryptocurrency is here to stay, at least for my lifetime. Solely because it's fun. But of course like anything, I could be wrong.