If I were Biden I’d be cheered by the lengths to which Clinton is going to discourage him.
I think if he gets in and any more negative stuff comes out about emails/security etc., her numbers will drop significantly.
If Biden doesn’t run, it will mean that he has looked at the race exclusively from the conventional wisdom perspective. From that vantage point he doesn’t have a chance. But in fact he does have a chance, especially if he can demonstrate that he could advance an Obama/Warren agenda and isn’t tainted, and then if one or two more negative revelations about Clinton occur. If he’s already in the race then, he is the beneficiary. If he’s not, then someone else will emerge.