treating trading as work can be done by professional traders because they already understand the whole of the trading and it can be one of the best ways to get profit.
I usually dont use to believe that people can make a living from day trading, but after reading some stories of people who were able to do that, I now believe that it is possible. But I dont do that, I rather have two jobs than rely only on one. Its good to have a stable job, since trading is quite unstable. And nothing wrong with making extra income.