There are two basic things that need to be implemented when the market suddenly falls like yesterday to make a profit. First, the attitude must remain calm by thinking that it will recover. Second, take the opportunity to buy as many coins as possible, such as top 10 coins.
But how will you know that it is the lowest it can fall? your advise is only for those who can Invest and HODL with their coins.
the problem is what about those short term traders in which we knew the majority of people here?
you can buy now and wait for a while but what if the fall continues and make your investment even lower to more than half and suddenly you need the funds ? then you are a actual loser?
this advise is depend on what is your strategy and capacity .