There are many factors that contribute to the low crypto prices right now. Mainly, the miners that are dumping mined BTC onto the markets to fund their operations keep a constant downward pressure on the market as well as retail investors that are capitulating their positions. Part of the reason why the price has been unable to gain any momentum upwards is because many of the large trades that are taking place are being done OTC (Over The Counter) and they don't affect market prices when transacted.