Asset management is the most important part of trading. if we invest with emotion it will affect our psychology when the price in the market goes down and up. Don't be in a hurry to buy and sell, always calm.
Yes, whatever the type of trading, such management was of great importance. If you know assets management and you are doing it right then you are a good trader. You can't be a good leader if you don't know how to work on assets management.