Coin flipping has so much to do with luck and with little or no skill at all whereas in day trading you can't just open a position to trade hinging on luck there must be an applied skills from a long time built technique.
I have learnt a number of lessons from my losses in gambling but I can't say I can depend and work with the experiences of those losses to make profit in subsequent bets but for trade the more experience and knowledge you possess the more chances you have of making profitable trades without having to be lucky at it.
Exactly, that's their difference. Experience in luck based games (or in coin flip specifically) doesn't increase your chances to profit the next time you gamble again. Because there's no skills that can help you to win, thus regardless of what you do the result will still depend on your luck.
While on trading, experience can help you to improve, this can increase the possibility to profit next time since you gained knowledge already from your past experiences. Although it is also risky just like gambling, but trading doesn't solely relying on luck. The more experience you have, means you already learned something, it could be another knowledge or strategy.
If you want to increase your chances of winning what you can actually choose is sports betting or skill-based games although there is also luck factor that can influence it but at least sports betting and skill-based games can be more profitable if gambler has extensive experience and knowledge.
But that what is called difference and every gambler definitely has their own preferences in choosing and calculating opportunities to win.
I still will never be able to reconcile gambling and trading because the two are clearly very different in every aspect.
If we could understand them as whole we would definitely be able to find the difference between trading and gambling.
At this point unfortunately there are still many people out there who have the wrong response or approach to trading and gambling.