Presumably, boosters who tell me it will eventually replace the world's various currencies do expect some level of stability, because nobody in their right mind is going to use a currency that deflates and inflates 40% month over month.

Lots of weak hands in it right now. More scaling debates, ominous US legislation, Goldman Sachs says it looks "heavy." I got out recently - for me it was the disposition effect [1], but shortly after, one of the more compelling global macro voices that I like to listen to, Raoul Pal, announced that he sold his stake. Makes me bearish long-term. Raoul's reasons were based on the malleability of the protocol and specifically that more than 21M bitcoins can be created at the whim of developers.

[1] https://en.wikipedia.org/wiki/Disposition_effect.