Crypto is nothing. Collectible maybe.
Totally speculative.
Kind of like the tulip bulbs in the Netherlands a long while ago. But the bulbs were still something real!
I could see people playing it short term, but long term investment? Never!
Almost nothing not we invest in is actually something. Stocks? And fractional piece of a legally defined fictional entity. Bonds? A loan to a fictional entity. Commodities? OK those are real but you probably want to have sold it before that matters.
All investment is speculative.