Trading is better than gambling because in trading there is assurance that you can have something in return when you give something or when you pay something, and the value of what you trade is usually the same value that you will get in return. For example you trade with bitcoin, if you pay the bitcoin which cost $1500, ofcourse they will give you a bitcoin that is worth the amount that you've paid. While in gambling sometimes even if you are already betting too much money or bitcoin, there is no assurance that you can win the same amount or there is possibility that you may loose. But if you want an easy money you can do gambling but there is no assurance. You can win or you can loose.
In trading, you buy something with intention to sell it later, because you expect that the price will rise, but there's no guarantee that this will happen, the price could easily go down, as many people also make their moves. I believe that trading can be even less profitable than some gambling, because dice sites have their house edge at around 1%, while newbie traders can easily lose a significant portion of their capital with blind trades. There's no easy way to make money, everything requires time and effort to develop skills needed to start making money.
In short, gambling is all about losing and winning, but mostly, it is all about losing, while in Trading, it is all about waiting for the right time to sell and buy Altcoins so you could have profit in the long run, and the you can't get the earnings like in trading if you are just going to gamble all of your money, though, there is only small chance of you winning the jackpot in gambling, and it is really difficult to take the risk, because you might lose more than the amount that you could win.