At this point it's all talk and speculation. Bitcoin has so much growth to offer to all involved parties, that one, especially in current extremely bullish market conditions, will only have the incentive to go long. It obviously doesn't meant that they will endlessly keep going long, but as long as there is new money being pumped into this market, there will be reason enough to remain bullish. The more people look to buy themselves into Bitcoin, the lower the overall on-exchange availability of Bitcoin is, and thus the larger this market will grow in the long term. I constantly see the mainstream media point out that due to the possibility to short, this market will be brought back to far below the $10,000 level where it belongs (according to them). It's obvious that not everyone is happy with how Bitcoin has gone up.