The right choice is to look at the market capitalization of the coins that you hold, many investors hold coins like Bitcoin and Ethereum, they will buy more when the price is low.
Bitcoin trading volume on CMC $ 5,235,265,106 and as we know, currently the price of Bitcoin is under $ 4000.
So if we trade when Bearish, you can buy and order above your purchase price.
Good luck friends, and trade with the skills you have