Where does this even come from? Is there any proof, or even reasonable speculation that it is backed by GS? Because I seriously doubt they would play in small potatoes alt coin markets. I think if they wanted in they would just manipulate the crap out of btc prices, and maybe ltc prices.
The biggest joke in the crypto scene is that somehow banks give a shit about a $4 billion marketcap product like Bitcoin. That is like a day's work in profit for them. Sure they may want the blockchain technology but the idea they are shaking in their boots over it is silly. It will be a LONG time until Bitcoin threatens the banker's way of life.