He might just do it. Michael Bloomberg, billionaire 38-times-over and former two-term successful Republican, then Independent, Mayor of New York, may enter the 2020 Presidential race.
Apparently, he has been indicating to his inner circle that he does not want to run, and did not intend to, because he expected Joe Biden to be the Democrat nominee.
But now that Biden is fading fast, and Elizabeth Warren with her very socialistic ideas appears poised to win the nomination, Bloomberg is apparently going to step in to run for the Democrat nominations.
For my part, I have little doubt that if he does, he will win that nomination, and having done so, will then go on to win the presidency.
The election will be a "battle of the billionaires", but Bloomberg will be a very compelling candidate for Independents, for NeverTrump Republicans (Democrats will always vote for the Democrat nominee regardless).
Bloomberg would likely be a very good President.