Good day, mates.
My strategy is to buy coins when the price drops sharply.
Sometimes I fail, because the price drops more than I expected.
But, to prevent this worse situation, I put 30% of my budget at the time of initial investment.
If the price getting down again, I put 30% more.
With this strategy, I am getting some money so far.
In conclusion, I recommend you guys to buy coins when they drops rapidly.
After sharp drop, there should be sharp rising.

You can see that with the market is constantly fluctuating and difficult to predict as the current time, I believe you should only short-term investment and trading day. In order to succeed commercially and minimize risk, I often divide my assets into three parts. One divide to buy coin at current price after technical analysis, one to DCA when price drops 10% and the rest to take precaution.