It really doesn't solve money, if central banks control it. As an analogy, let's say you have a fixed number of dollar bills, and the gov says we will never print another dollar bill. So as the economy grows, the demand for commensurate dollars grows, and the dollar skyrockets in value. Deflationary spiral, and gov, a net borrower defaults, or economy goes into depression. So the gov comes out and says, you know, that dollar (btc) you own? It's not worth 100k, we are going to devalue and say it is worth 50k. And Mr hodler, if we catch you doing any funny shit on the side, we will consider you a counterfeiter. We have an irs agent on the way to discuss this with you.