Maybe in the early 2000 and 90s you can do really well by trading actively.
In modern era if someone try to show off say he is a trader full time etc to me, i merely smiled. Cos i have friends working in the bank, he told me due to the computing sci guy automated so many of the process, and learning through machine learning, there is no way you can beat the major banks/hedge funds. Statistics is against you. of cos there are still 1 percent of the traders that is still able to make a living, my brain is for science, this kind of stuff I know I am not that 1 percent.