I sincerely doubt trump will face any charges related to his time in office.
Why?
Because its not in the interests of America nor the Democrats
Why?
Because it forever leaves the door open to retrospectively prosecute anything a democratic president does in office (even if lawful at the time - think stuff to do with abortion and how republicans would love to prosecute for genocide).
But Trump is a creature of habit and a long term grifter and crook. His businesses are only doing well on the back of his white house address. Once removed from office that starts to crumble.
He no longer has the protection of office over his tax affairs. That means going forever his tax affairs are open season and will come under scrutiny.
And tbh, many, many Republicans want shot of him just as much as Democrats because he's now no longer of use to him and he's got a majority on the supreme court for them. In the long term they want any future candidate for the presidency to not be the same loose canon. And in primaries it will be interesting to see how things go - the Republican party is currently a coalition of libertarian capitalists, the religious right and the far right racists. Trump united them, but the manner of his departure is also likely to provoke infighting and conflict and i dont think Trump will be able to unite them again once the spell of fear he has over them breaks with his current actions.
The Democrats are wiser to tread carefully and wait for him to perform to character on a non political issue (tax, i'll put money on it being tax) and drop himself in it. It avoids certain conflicts and accusations. And the possibility of future political tit for tat. And they may well be aided by republicans whom Trump scorned. There is a queue out the door waiting to cash in on the inside story and to serve their revenge in the same fashion as Greta.
Donnie, Eric and Jared will also be up for all sorts of shit. Ivana will probably escape by virtue of being a mother and it being 'unseemly to pursue her for the sake of the kids'. Remember the US is socially conservative - it does serve the democrats politically to jail a mother of young kids.
Biden is sharp enough and smart enough to understand the pitfalls of going after the Trumps head on and politically. He's a centrist and they are pragmatic rather than ideologically driven. And that's what the US needs right now.
Plenty on the left in American politics and UK politics will be disappointed in this, but its what has to happen to move forward. This is how peace settlements (like our own GFA) are brokered. By difficult compromises to protect the security and stability of the future rather than drinking from the poisoned cup of the past.
Its funny how the last 4 years has been characterised by the cartoon of good v evil. There are so many well mannered innocent republicans whose sin is purely to have a sheltered life and not have othee outside influences beyond their small world. They are good people. Just flawed humans trying to get by as best they know. And explain away their cognitive dissonance and hypocrisy in just the same way an anti-capitalist who buys off amazon during lockdown cos its easy might.
Revenge on Trump isn't going to solve the problems the US faces. Trump must be put to trial in terms of facing justice for crimes against shared republican and democrat concerns and interests if it is to happen. The narrative is the important thing not the charges in the long run.
So everyone rubbing their hands that he will soon be in prison should step back and ask about what the end game is here.