Well, I'm not a gambling person but I'm definitely a bitcoin person. You cannot be 100% sure if you lose or win, that's true. But there are market predictions, there're bullish and bearish markets. So, it's not a total mystery. The more you trade, the more you understand the basics
Lose or Win terms are not applicable to Spot trading, you dont lose but you convert from one asset to another, technically it is not a loss unless that asset reaches near zero fiat valuation. But in trading modes other than spot, you will lose money because those are all in reality a method of gambling. The market trend is a term that is applicable to most spot trading.
If you trade with emotions so yeah, trading and gambling are the same. But if you know the basics, you understand the only mutual thing is the risk.
I think you overlooked, I had explained above that EV- games predominate in gambling while trading other than spot are compared to be similar because they are based on chance. Some EV+ games are there and we also have spot trading both these groups require skills.