There's an old saying "Buy when the market is green and sell when the market is red".
It's arguably one of the better strategy as your money won't remain stale. When you see a bullish trend, you buy the first moment you can and when you thin it's turning into a bear, you sell. Short term investors earned a good profit in last 1 month as compared to holders that are holding for last 2 years. Different people have different strategy when it comes into trading but the essence is to increase your profit while limiting your loss.
In one way or another, securing a return on your investment is the most important thing when investing, and you need to have a specific plan before you start. Any investment can be risky if the market conditions are not good because it is usually the time when investors are most panic.
I'm not good at trading, but I understand how this market works so don't be too optimistic when investing.