Yesterday the blood was catalyzed by Charlie Lee's tweet, amidst a sea of mounting speculation and fear. The markets are pricing in the potential news from China and a lot of people are cashing out. Even if China does "ban bitcoin" or just the exchanges, the price won't fall forever. The rest of the world will continue to use cryptocurrencies and they will increase in popularity....and China will be missing out on a huge market (which i don't find likely). Anyway, don't be worried. These corrections happen. Try to not panic sell and try not checking the charts too often. If you are too worried, maybe you have overinvested and reconsider your investment strategy.