I think you should set profit and loss targets. It will help you solve this worry. This is the situation of unprecedented trading speculators.
You need to set it up and place the order exactly what you set out. Not more and not less.
In the field of investment, you need discipline and persistence, if you can't practice to have it, you will easily fail.
I would tried the following strategy: if 15 min time frame is of positive trend for 7-9 candles then I open Buy position and set TP at 100 pips (or 100 USD) and then close a position.
then I make the same thing but with 2x volume.
Your trading strategy is interesting but in my opinion, your tactics can lead to losses if you do not read the news and monitor the current situation on the entire crypto-exchange market.
I do not like to hold coins without solid reasons so I personally prefer to quickly make profits. I just try to hear rumors and buy a promising crypto-currency. Then I wait for the growth of its price, for example, by 10-15%. I often place the trailing orders to gain a maximal profit.
I believe that it is necessary to know how will the coin you bought will be improved by its team in the future.