Cars are poor investments, if in doubt, buy a brand new car, drive it for 2 months and try to sell it to anyone for the same price at which you bought it.
Unless a car is rare, in demand by collectors, and you do not drive it, it is going to depreciate. You will not find Warren Buffet, Bill Gates or Bezos buying cars the way the Kenyan chap is. Generational wealth is supposed to grow not shrink, lakini pesa ni zake. Hopefully wajukuu wake hawatakuwa masikini.