While reading some discussions here, I've noticed that some people thought trading is part of gambling.
IMO, to be specific, when we're trading, it should be a risk. Risk means, you have considered the possible effects of your decisions and you can predict the movements in the market.
Gambling is more on guessing, we don't have control over the possible outcome. Obviously, guessing can't be applied in trading, it'll just give you a huge loss. So definitely, based on the definition, the term we should adapt is risk.
In my own point of view, gambling is really a risk because there will be a possible effects on your decision, and trading is also risk because you are also making a decision and mostly you are predicting the next move of the market, so how would you say that traders are not guessing or predicting? It is the reason why traders are making their own theories on what are the reasons why bitcoin and other cryptocurrencies have a sudden downfall to it's price.