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So, do you think gambling is the same as day trading because both are easy to do and have goals to earn money? Playing gambling like dice or roulette is indeed so easy, but I doubt if day trading is as easy as the games. It needs skills, not only about monitoring up and down the rates/prices. However, easy or not sometimes will be quite subjective. Some people may think day trading is easy but others not.
I also believe that day trading is much more demanding on skills than playing many gambling games. I wrote about this earlier. However, reading the topic we can see that a large number of people put an equal sign between day trading and gambling. I think that this is primarily a matter of luck. A lot depends on luck in both trading and gambling. That's the reason.