There is nothing special in the fall of crypto. In contrast to, let's say, stock companies or assets such as oil, gold, digital money has no real price indicators. For stocks, this is the number of customers, the cost of means of production, various types of patents, and so on. For gold and oil - the number of units produced, stocks, demand growth due to new productions (say, chemical). In crypto, it's easier and therefore unusual: pure demand and pure offer.