I think the big banks and govt's are behind the cryptos. They want the currency to be digital and transparent. Plus they know the old system is broken. In 2008 the world felt the broken system. They knew they had to do something, but they couldnt say "hey our system is broken", the world would really go to shit.
So they secretly usher out a crypto and let free market run and see what transpires and how free trade improves the final product. Once they see how they can benefit above the people they will than regulate the shit out of cryptos and the only left standing cryptos are going to be the one they control with complete transparency.

BUT
A transparent blockchain keeps them from being fraudulent.