That would help for sure, but it need not be assumed. There are other collections of text besides the public internet. Some of which are only accessible by cert

That would help for sure, but it need not be assumed. There are other collections of text besides the public internet. Some of which are only accessible by certain entities and certain of their employees, to be sure, but still extant. Email, for example. Note I’m not implying the person has done anything wrong... on the contrary. But someone with a large quantity of BTC has reasons to be wary of rogue actors.