A very good solution for the world economy is to link free cash with bitcoin. Some national and commercial banks have a huge surplus of fiat money. They do not know what to do with them. 
Unfortunately that is never going to be a possibility since its the very banks that are so critical of bitcoins, if they were wiser, they would have invested all those profits they had accumulated over the years into bitcoins instead of always criticizing it.Always critize the bitcoin because the possibilito to be a threat to the banker.
Very true about being a threat to bankers, but also they cant. Their regulation, that has fended off competition has also become their prison.