Sorry if I didnt understand sarcasm, but in case you are serious, "speculation" is not the same as "store of value." Whether crypto is a good speculation target is a difficult question, but most do not sell crypto as a "speculation target" as its primary attribute. It is also unlikely that something whose primary attribute is speculation can have a positive roi long term.
There's a chance that lottery tickets go up 1,000,000x. There's a chance that vintage NES controllers go up 100x. There is a chance that baseball cards go up 100x.
Literally all things have a an arbitrary growth ceiling.