Banks corrupting Crypto-Economy

Today 87 of the top 100 (ranked by market cap) have seen an increase in value.

Although it is not unexpected to see the value of cryptocurrencies grow, having an increase of value in nearly all of them seems unlikely. I hope that the banks don't corrupt the new ecosystems by pumping lots of inflated money in Bitcoin and co. to let a big bubble burst in order to get the people back to using old, unsustainable currencies, prohibiting society to advance.
I personally don't necessarily believe this to be true, but I want everyone to stay sceptic. It does not stand in the interest of banks and most of the big corporations to give people the power they are used to exploit. We will never give up, broken systems will be patched. Always.