There is no chance of Trump being destitute. That's not the reason for not making the bond.
Define "destitute". Will Trump ever be in danger of being homeless and on the streets. No. Will be ever have access to unlimited funds again - probably not. When guys like Trump fall, nobody helps them.
Trump screwed over everyone he's ever known or done business with, including family members. Nobody will help him now. They'll just pick up his properties for cheap if they can.