generally is buy when prices are cheap and sell when prices are high. and of course every trader has a different strategy. for me personally in trading certainly buy some stable coins or coins that have high volumes, and is done in large exchanges such as Binanc or Kucoin.
Before deciding to trade, we must be prepared to accept the risks that will occur, even experienced traders can get caught in a pit of loss because the cryptocurrency market is very difficult to guess. Having a surefire strategy is the main capital in trading, Remember, do quality trade, not with quantity.