His confiscated coins are legally, officially, lost (to him) forever.
The issue is: has he got some secret stash somewhere? Does he still hold the keys to it?
A Coinbase snoop is suggesting he located some coins that may be old Silk Road treasure.
It still remains to be seen if it's like he says - and if Ross manages to lay hands on them.
If I were Ross, I would only attempt that when safely far from the USA.
If I had to bet... There is a higher than 50% probability that he has some coins "here and there". And what was once considered "peanuts", more so by someone who was making millions of $ at the time, can have an astronomical value nowadays.
Maybe he could have some "anonymous" donations sent to him... but surely the origin of those coins would be very well scrutinized. Also I am not so sure it is so easy to be "safely far from the USA" (See Roger Ver and the "exit tax") but....
Doesn't the pardon apply to every and all things related to his case? If that was the case (I don't know) maybe he would just need to "produce" them now (or as he is gradually able to remember how to recover control of those coins) and pay his share of taxes and call it a day?