I don't know how one makes lots of profit in one day, it is like gambling, I think you don't need to make bet for every game.
Trading is not gambling, only those that enter trading with the gambling mindset lose a lot of money, If you must trade, one must learn about the rudiments, risk management and basic trading knowledge. There are so many rules to it that can be found in a lot of infos shared in different sections in this forum, just use the search button and right keyword
I hope a lot of people actually know that, because if we are really to dig deeper to check, most people actually gamble, not trade. The thing with trading is that you will always require a very good strategy to be able to do right and once that strategy is not in place, everything a trader does is gamble afterwards.
The thing is that, as long as you do not know when should be the right time for you to buy, or the right time to sell or have a planned stop loss just in case things does not work out the way you want, the chances of getting screwed will always be there because in that case, what the person would be depending on is luck and that is gambling.