I would suggest you to Sell your coin when the price is high and buy bitcoin when price is down and to do so u need to keep track of btc price
not that easy at it seems, it's like you are telling him to try to win at a dice game or slot machine by simply having more luck
not a thing you can control you know...
trading isn't the ebst way especially if you're not a good trader and if OP is asking this i'm sure he isn't one of those good traders...