Trump has a lot to worry about before running for re-election in 2024.
1.) He has payments on loans that he's made from other countries that are coming due in the next couple of years from now (approximately $421 million in total),
2.) He has mountains of lawsuits before & during his presidency (& cities/states will most likely file lawsuits against him because they want to get their money back from him from all of those rallies he's held from 2015 to now, as he refused to pay them for),
3.) He has to deal with the possible divorce from Melania which is most likely going to cost him in alimony & in child support for Barron,
4.) He has state charges from New York against him like tax evasion, etc., & Letitia James is eying on him once he's a private citizen again (She's the Attorney General of New York from Brooklyn), &
5.) He's just as old as his base is, & may not even make it to 2024 due to his age (he'll be 78 by that year) & bad health with no exercise, plus carrying a lot of stress from being president.
Chances are, he'll be very busy for the rest of his life.