You get 10 million dollars but you can’t let anyone find out

You are given 10 million dollars tax free, and you may spend it as you like, but if someone finds out you spend it you lose it all. You can buy anything you want as long as no one has concrete proof of your transactions. For example while it would be suspicious that all of a sudden you get a yacht, no one can say a thing unless they have proof. Also, the money is on a bank account and you can’t withdraw it or turn it into gold. What would you do to hide your transactions?