Concerning the Biden decision to suspend his campaign for the Democrat nomination, conspiracy theories are already flying thick and fast. One of my favorites is that he didn't do it at all, but that it was done for him, in spite of his wishes. Ludicrous, of course, imagine him being unwilling to disavow something done without his approval.
I'm fully prepared to believe he was coerced into dropping out by Pelosi and Obama, among others. The donor cash dried up and the chorus of those telling him he was damaging the party to which he'd given his life got overwhelming.
Expect him to issue blanket pardons to all members of his family, likely including himself, after the election and before leaving office. I would, in his shoes, just for spite.