There are also a bunch of accounts that never did a withdrawal, so for those I am likely going to put together a donation
I would advise you not to do that. Keep them in reserve, safely stored somewhere offline. Forever, if it comes to that. But you're exposing yourself to a potentially huge liability in the future, if you do otherwise.
Meanwhile, when they remain frozen, they act like a small donation to the whole economy.
That was my inclination as well. Unfortunately I do not believe I will be allowed to hold them. I'd have to put them into receivership, which would cost a significant chunk of change. (more than they are worth.) Especially since I do not believe there are any receivership companies out there that would know quite what to do with them.
I will definitely hold off on it as long as I can.
I wonder if holding them on trust would satisfy your local authorities?
Obviously I don't know the amounts involved, but if btc appreciates to the degree many think it will, you could be surprised who crawls out of the woodwork in 2-3 years wanting their windfall. Even 1 btc could be a tidy sum by then, enough to hire a lawyer to fight for it.