One would have to be the most irresponsible person on earth to blow $400 plus million.
Even if you bought houses, cars, and lavish goods, to a certain extent they would be considered assets.
I agree that most people would engage in massive splurging for the 1st few years. However in my humble opinion after a few years, you’ll start to develop the “rich man’s mindset”, and your taste in lavish goods will likely die down tremendously. You’ll start to move a lot quieter, and you’ll be more interested in building upon the wealth you have and creating opportunities for others, than you would showing it off. Just my humble opinion.