Given Trump has promised blanket pardons for any illegality from his administration during his term, I think the question will be whether pardons for crimes not yet investigated/charged are covered by the pardon and whether anyone will pursue those investigations and convictions.

Democrats have historically not really been willing to do anything if there's any plausible sounding reason for doing nothing, so I'm guessing they'll jump at the opportunity to wave away the insider trading stuff. Let bygones be bygones, you know, in the spirit of bipartisanship and comity. They slow-rolled prosecuting the crimes of the first Trump administration. So slow that he was re-elected before anything began to happen.