Unless you physically bang him up in jail for a long time*, he can stand and he will probably win. I mean, just look who he's up against. Biden is slow, hesitant, creaky and prone to falling over. You can bet your life that Trump will use all that against Biden incredibly effectively. It'll be looking like Reagan vs Carter all over again. Yeah, there I go again...

*I think I read somewhere that even that might not stop him.