One strategy that works best in times of fall in the market is to remain calm, and not allow yourself to be blown by panic. Just hold the tokens with large caps and even if possible, buy more tokens and hold. For some coins like Bitcoin and Ethereum, it is always certain that whenever there is a fall, there is definitely going to be a rise.
What will you do when the market falls?
This is not strategy, this is a gambling! It's true that coin like Ethereum will rise again, but when it down like -70% and you are still holding, how much time you have to wait for price to go up 70% ! and when it's up 70%, you just have your money back !
For me I make a plan the moment I buy any coin, for example I decide if certain goes down like 15%, I will sold out and save my capital.