You can't "steal" crypto; it's all just a scam that operates outside of the law.
I mean, sure, we can use the language of theft and crime figuratively, just like when we talk about animals. For instance, "the wolf stole a chicken from the coop".
If SBF had merely stolen cryptocurrency, then the FTX exchange wouldn't have collapsed entirely. SBF stole customer funds on a line of infinite credit and infinite liquidity, basically lying to customers that he owned the asset they wanted when in reality he defrauded them for speculative gain.
I mean, sure, we can use the language of theft and crime figuratively, just like when we talk about animals. For instance, "the wolf stole a chicken from the coop".