I would found a libertarian city state similar to singapore or monaco.
If libertarianism is right, these types of city states should eventually out-compete nations as they are much more efficient.
I'd like to see humanity return to city states as the tendency towards ever greater levels of centralization in government is clearly detrimental.
after that was up and running I'd retire to a harem that made the playboy mansion look like a church service.
Out-of-context quote of the day:
From Simon Johnson, Director of the IMF's Research Department, on "The Rise of Sovereign Wealth Funds".
So if you had $10 trillion, what would you do with it?