I have a very simple strategy. But it only works with quality coins. Not shitcoins. Split your money into 10 parts. Buy with 1 part, prepare to buy again 50% down with 2 parts, another 50% again with 3 parts this time and yet another time again with 4 parts. Do the same when price goes up 100%! Split your bag into 10 parts, sell the first part when price goes up 100%, two parts when price goes up another 100% and so on!