besides spend it on frivolous shit like yachts and planes and stuff, there's no way it's all liquid. do they just park all their billions in a bunch of investment vehicles and wait for it to propagate itself? don't they get bored of just waiting and watching line go up?
Doing fun shit is expensive, but once you've got five or six million dollars to play with you can do a lot of fun shit and not have to worry about running out of money.