well, the very big difference i know from gamblers and traders is, gamblers purely expect luck in doing that, while traders are based on analysis, research and also other things to get it. Moreover, in the world of traders you are not risking your money 100%, even when the price drops, you still have the same amount of assets. whereas in gambling, when you lose, you lose everything.
Traders and gamblers share a common thing, both have risks. But traders have their own way to lessen the risk because they make preparations prior to trading. And by making theirselves exposed to technical and fundamental factors in trading, they create higher chances to win their trades. However, gamblers do the opposite thing. They always gamble with no preparations, just pure luck. And when they start to gamble, they mostly go all in. So they end up losing everything.