rpietila and his clients are certainly a buying (now) force in the xmr market, but why people like you keep suggesting he is the only one?
Because people follow him. He's like a market maker.
Ill break down exactly what Im SPECULATING is happening. LET ME MAKE IT CLEAR ALSO THAT THIS IS IN NO WAY A DIG AT RISTO, I LIKE HIM.
He announces the price will now rise. Not a hard predicition to make when your going to start buying. Begins buying along with the other people who see announcement. Price rises and everyones frothing at the mouth about how great of a prediction it was adding credability to what he says. The hubris takes us up to around December high. He realises he's the only one really buying still. (at this point lots of people are selling for 60%+ profit). Then comes on here and announces Im bearish for such and such a reason to explain why the price then drops because hes stopped buying. Anouncing Im bearish also makes the people who blindly follow then sell, adding to the drop and again adding credibility to what he says.
My point is its not hard to predict the market when your making the majority of buys and then letting it fall when you stop.
Im not saying he's the only one at all but certainly the main one hence why now he's stopped buying it will go back down. I'd love to be proved wrong, please everyone buy it up lets break the December high without Ristos buying but in my opinion its not going to happen soon.