I'd have to invest in something that required me to get up on a weekday and do something with it. You need some kind of job to keep you motivated or you will just get lazy, fat and die.

With that being said, I'd get a house built exactly how I wanted here in England, stick an Aston Martin DB9, a Ferrari 360 Spider and a Pagani Zonda in front of it and fuck off to Las Vegas and buy an apartment to stay in for every major fight, one with a nice view of the strip like this would do.