The best trading strategy i think is to buy at low prices and resell at high prices for earn profit, it can be short or long term, depending on market price developments, no problem having to hold the coins in the long term if the coin price down as long as it still gain some profit
By reading a relevant information on how to improve your trading strategy, this would help you.
Always put in mind that trading is a long term activity, you can make money in trading only if you are consistent enough, meaning, you have
the experience and you have develop yourself to be a good trader.
However, in my opinion, I think we shouldn't think ourself as the good trader, because on the market, not only cryptocurrency, experience is unlimit and the loss always available for those who forget it while earning many profits. Humble and trading carefully, you will always succeed.