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.

of course. buy when the price drops are very good, but we don't know after that his price will rise or even more drops. your strategy is good i think, at least we can get profit from the second investment.