I can't see why this stable coins will be dangerous in the market, I mean all of the traders are only shifting their funds to this coins as a safe heaven during big dips but I don't see the traders staying long on these kinds of coins. Plus the manipulation you are talking about has always been there in the market, the price movements we are seeing right now are always influence with something and it won't change as whales will always be here making profits out of us. Stable coins are really not a threat for any of us.