Your strategy is good, but a lot of traders don't have patience to wait they want to trade frequently. As they used to trading often, so if they don't trade for some time they feel unease. Anyway, you have to study the market and follow the chart regularly or you would miss the train of positive trend.
You dont have to trade everyday because you want to. Being a diligent trader is knowing when the buy and sell and what to buy and sell. I would stress on the "when" part of my statement more though. That means not everyday would be good for every trader. Thus missing out on a positive trend would mean you have lost that opportunity but you should not try to jump back into it. Let it go for now.
These things can happen and being not greedy about the lost opportunity makes a person wise. Rather keep track of that coin and enter when it comes back down.
Yes it is good to trade only if you see price is improving little normally but in case if you are new try to have patience. Before getting in trading gain knowledge as much as you can increase your knowledge, greed is surely curse and one should not be greedy, waiting is the best reward for the holders, price rise fall should be taken serious so you will gain good experience,