From my perspective, trading bitcoins or altcoins can be considered as gambling, with a much lower level of risk, of course. When i trade i'm researching coins same as some sports gambler research football teams. In both cases it's gamble if you don't have some reliable insider info..
if you compared trading with sports betting yeah it's makes sense both are requiered some research to maximize your chance to win and get profit but if you compare trading with a casino games like blackjack, roulette , lotterry , slots machine , dice etc could you still call it as same thing as trading ? no of course not.
even if you are comparing trading with those gambling games that require skills more than luck like betting on sports, there is still a lot of big differences between gambling and trading.
because although there is so little need to luck in trading, there is a lot of luck needed in gambling even if you are gather information on the sports and making a good bet, you are still risking a lot.
so the point are trading are not gambling . but sometimes in trading you need to gamble on uncertain situation. as most of the times trading are about to predict the price based on multiple factor and gambling morelikely to a pure guessing based on nothing except sports betting of course.