I do think Biden will drop out soon. I also think we're going to end-up with a contested convention (which is exactly how a Bernie-Klobuchar ticket could happen).
Don't see Buttigieg as anyone's VP - white male, and gay, is not going to help anyone's ticket. I'd like to see Gabbard on the ticket.
This race could end-up playing out a lot like Repubs in 2016. Bernie has his core of voters, even more if Warren drops out, and then you could have 3 or 4 "moderates" splitting the rest.
It seems like few Dems are confident any of these people can beat Trump. I could see voters coalescing around Bloomberg, not to mention the trucks of money he has to spend. He might be the only one that can win the general.