Of course, the best time to buy a cryptocurrency is when it drops in value. However, this only applies to potential types of cryptocurrencies. The reason is not particularly important here, but the very fact of a decent fall in prices is important. Sometimes there are also situations when, due to good news or events, the cryptocurrency also begins to grow. Here you already need to be careful, because after a while the price may return to its original position again. In general, here you need to feel the specific situation.