rich ppl are so boring
If you really had to invest all that into temporary material things instead of the public good, why do what thousands have done before you and just flex the usual cars and planes and bags? You could literally be more interesting by flexing having the newest eco thing, like some futuristic e-car, a solarpunk-like home, unusual stuff like those expensive solar jackets that charge your phone, a machine that cleans the ocean floor having your name printed on it etc.
As usual money cannot buy taste, morals, vision, a personality