I think you are paranoid. Trump is 69 YO and I think wants to leave a legacy for his children and the country. Look at all of the other candidates - they are professional politicians who run for office over and over again hoping to earn a little money on the side. Trump is the least corrupt of all of them IMHO.
You really need to read more about him. For example, is using eminent domain to take a house from an old lady, “not corrupt.” Trump uses politicians and strong arm government for his own ends. He is no free market capitalist.