Unfortunately, a president can't reverse a former president's pardons.
And although I agree with the overall sentiment that money buys innocence, I think that is one reason the various legal entities are taking so long to build a case. It looks like the New York DA is wimping out already on the criminal case, but Georgia continues apace.
I am pretty sure, though, that there is a very large target on his back.
There are young prosecutors all over the place right now sharpening their blades. It just takes time.
If it was me in charge, I'd bust him for treason for siding with Putin on this Ukraine thing. That's called giving comfort to the enemy. He should be behind bars for that, and it isn't complicated like the financial stuff.
Hang in there. Have hope!