I'd imagine a business or bank will make the purchase, and they likely don't care about the anonymity aspects.

Does Donald Trump or Bill Gates have to shy away the fact that they have seemingly endless amounts of money?

Can you irrevocably transfer all their money in seconds to an anonymous & untouchable account by coercing them to give up, or hack in and steal, a private cryptokey consisting of a handful of bytes?

Well we know the US Government has them, so I presume they'd be a strong target now