And now they have bitcoin to put their money into. That's a large part of what's driving the boom. And you know what? It'll keep going. If they're willing to invest billions in ghost cities they're willing to drive bitcoin above $10,000.
I'm not bold enough to claim that bitcoin is a bad investment, but to me it seems closer to gambling than investment. As long as it's money you're not afraid to lose, go for it. But for me there are too many uncertainties and I'm not willing to invest the time. There are so many other opportunities.
Edit: Here's some info on the ghost cities http://www.forbes.com/sites/kenrapoza/2013/09/24/what-invest...