Beginners don't know how they should trade. If they are able to make big profit by investing a small amount at that time then surely they will gamble for more profit from trading and it is very natural to do so. But just as luck is not permanent in gambling like one or two bets you have to loss, similarly the condition of all traders who conduct trading without acquiring trading knowledge will be at the same level.
Trading is not a gamble where one can rely purely on luck. Before taking a trade, if the market conditions are not well understood or risk management or money management is not well understood, then trading will not be any different from gambling. Those who equate trading with luck may profit in a few trades but lose all their money in the long run. Trading requires a trader to have adequate knowledge and understanding of trading strategies otherwise trading will be compared to gambling.
This is true, if you are a newbie, there is no possible way of sustained profit, you will eventually lose. You need to learn how to trade and study all the methods and gain experience to have a profit consistently, which requires time and effort.
So if you are a newbie that made some money, know that it's all luck and you need to save that aside, and do not go chasing for even more profit because you are going to end up losing all the profits you made and then some, eating up on your cash. This isn't all that easy, but we could definitely reach to a point where we could make some money, and because of this we need more time, and it will eventually reach to a point where it will be great for everyone. I believe the best way to move forward would be just stick to learning.