Trump is 74 years old. In 4 years, he'll be Biden's age, and does he stay in as good shape? Not really. He eats hamberders, he doesn't work out, his doctor has to mix cauliflower into his mashed potatoes to make sure he gets his veggies.
I know you guys think he's superman but he's not going to last forever -- even if he manages to dodge the Category-5 legal hurricane heading his way.
The PGA tournament cancelled their event at Trump golf courses. Particularly after this riot, few people are going to want to do business with him. The release of more tax information pursuant to investigations will pull back the curtain even more on his "businesses" which haven't done particularly well from a fundamental perspective and rely upon his celebrity status, which has taken a yuuuuuuuuge hit.
The next few years are going to be rough for him. His base still inexplicably loves him, but the country will move on and the Republican Party would be wise to get rid of him. If he runs, and somehow wins the GOP primary *again*, he won't win the general election.
The Capitol Hill riot provides the perfect opportunity for the GOP to sever that relationship for good.