Mine is simple and the best. Buy low, wait, sell high.

For extra I do day trading when there is panic making the price swing up and down.
Don't force yourself to trade that much, take some distance from time to time.
my strategy is almost same as yours but i upgraded it, as i sell only when price rises 15% more than i bought, so this way i always get profit, as i trade bitcoins only
but not trading and just keeping eye on price is good too as you will get needed info so you will be able to predict price in future, and if you will do that you will get more profit