Concentrating time on trading will be better than playing gambling because trading will give you more opportunities to make a profit. And if you continue to study trading analysis, it will surely be useful in finding coins to trade. The better your analytical skills, the greater your chances of making a profit. And you can also set aside a small amount of money for other things that can benefit you in the future so you can make a profit too. But it's different if you focus on gambling, where gambling is not a place to profit.
Actually trading is not that easy as it sounds, to make money through trading you need to learn and build trading skills. On the other hand gambling is just game meant for entertainment wherein a player with out any skills can win money with only luck. With trading you do need some luck but skills plays a major role in your earning. Day trading is way to make money through trading everyday and most pro traders are doing day trading.
Logically right, it's not easy for it is but if you take time to learn more about what influence or what are the factors that impact the market then future trading may give you some decent profits, though same concept with gambling mostly with sports betting where you can also research what are the things that might impact the possible outcome of the game before placing your bet.
Opinion base for me, it's either you choose future trade or gambling in taking the risk and have that time to continue studying the market of your chose to make some good patterns and strategy that may give you extra edge and possible positive income.