That's a good counter argument, thank you. This is why I also mentioned betting against over a multi-year period, which you can do manually like Sam Altman did

That's a good counter argument, thank you. This is why I also mentioned betting against over a multi-year period, which you can do manually like Sam Altman did with tech valuations, or using something like longbets.org. You can also structure the bets so your losses or gains are limited or unlimited on whatever side you want, assuming you find a counterparty who is willing to take the bet. It is definitely more work though and maybe not something most people are willing to do unless they have strong reasons to believe they are right and can profit from it. (Another way is also to do proxy bets/investments, i.e. go long on things that are inversely correlated with X, but this is less practical in the case of cryptocurrencies for various reasons.)