Investment is very important in cryptocurrencies because one cannot predict future market conditions. So if you want to invest in cryptocurrencies then you should invest step by step. Imagine you should invest 1000 dollars.. then you should divide 50% on cryptocurrencies and others part you should waiting for market down...
accumulate investment assets gradually I think is a much better choice.
buy some when the market is in a downtrend. and save some to be ready to buy again when the market returns to the downside. so we can have a better average asset. wait until the decline is over and just buy I guess it will be difficult. because the market keeps moving and we won't know how the price hit bottom.