Biden is looking vulnerable but there is a year until the election. It is way too soon IMO to make any kind of certain prediction. The domestic and international scene are way too chaotic right now. There's so many things that could potentially happen that would effect the election.
I mean either Biden or Trump could easily DIE before the election of old age. These two fucks look like utter shit. Personally I'm not going to start making any dire/uplifting predictions until after the conventions in July and August.