Interesting. Wouldn't that suggest that they either ... know who he was and were able to coerce his keys out of him OR they we're able to compromise his keys, which would undermine the entire point of Bitcoin's security? Genuinely curious.

That would explain the disappearance but I highly doubt the government would be able to foresee the invention’s significance. I suppose he/she could have donated them for love of country, but no one, not even Joe Biden, loves the USG. Especially its money printer. So how would they have obtained them and when?