I like this except for

Now I don't want him drowning in red herrings, so if you send him links to coins which aren't his missing numbers he'll mute you and you won't have any chance to find his lost loot and claim the bounty.

because I think attempts made in good faith to try and help track the movement of these coins should not go punished like that, of course the story is different if someone wastes a huge amount of his time on bad leads.