In the current situation of the market crash, how should the positions be allocated?

Trump's inauguration is bullish news for the market, and the market will rise to accommodate his ideas. In the current market situation, how should positions be allocated and how to seize subsequent investment opportunities, while also reminding not to invest blindly, but to make decisions carefully. There may be a rebound later, it is recommended to enter a 10% position. This way, there is a 20% profit potential with only a 10% loss.