let me guess, surely you do leverage trading, leverage trading can indeed maximize profit, but the risk is also very big, very not recommended especially for beginners, in this forum there are many who trade bitcoin but don't lose all bitcoin, so far my bitcoin is still okay, because I trade normally without leverage.
Due to lower profits in spot trading and hence he might be one of the leverage traders. This kind of trading is really much riskier but it also gives huge profits. It is somewhat similar to betting as you said as we actually need to predict the price to short or long our orders.
Ordinary trading can too give us profits if we diversify our capital into some high volatile coins and then start trading with them in the high volatile markets. This might also start being an hobby as you would need to start gaining interest in speculating the graphs all the time to make you even more closer to the markets and gain more profits.