For me the strategy is very simple. Buy the coins when the market is going low. Hold the coins and wait for the bull run. When you see you can get a good profit, sell them, very easy.
That's great strategy I know all investor's of bitcoin to that strategy cause it simple and easy. Buy bitcoin until the value is down and wait for right time to sell it and you will earn more profit in your investment.
All investors do not 'buy low and sell high' and also it is not 'simple and easy'.
Investment strategies differ and the nature of cryptocurrency market makes it very difficult to predict where the bottom would be, and where the peak is.
There are also other strategies asides 'going long', but you would need more in-depth understanding of the bitcoin network and the market