I'd like to know what's in the hold of my ships.
Seriously though, that's such an enormous supply of money that one can't even think of what to do with it. Think of the inflation...
Anywho, all in good fun:
--Pay off the national debt.
--Go full tilt into as many clean energy sources as possible.
--Ditto for unmanned spaceflight and exoplanet research--heck, for big scopes in general.
--Ditto again for SSC.
--Advanced propulsion technology.
--Gosh...massive urban renewal projects and school reforms...I could really go on and on.