Bitcoin is great that is why is not surprise to all of us here, if bitcoin price hit 50,000 but it will happened if many people sell or convert or use their bitcoin as means of payment so the demand increase the price is also increase.
Well i won't take that seriously same as those saying btc will end at 3k or less. It will when it will. Having too high or too low expectation won't really help you and can only cause either panic or greediness. I'd keep cool about it and manage my expectations conservatively