From Matt Ygelzias:

Speaking at a fundraiser in Massachusetts last week, Joe Biden reportedly said that “If Trump wasn’t running, I’m not sure I’d be running, but we cannot let him win.”

This is probably just bluster. My strong suspicion is that even if Trump were to die unexpectedly of a heart attack tomorrow, throwing the GOP into chaos, Biden would still run for re-election.

If Trump unexpectedly doesn't run before the 2024 DNC, this market resolves whether the DNC nominates Joe Biden as candidate for president in 2024. This could mean death, or whatever reason that makes the mainstream media to report that Trump isn't running.

Otherwise, this market will resolve to N/A.

I will bet on this market.