I gamble and trade USD to BTC and vice-versa, gambling and trading can be very close sometimes if you trade randomly and will have no difference to gambling in general, but using indicators and trying to predict using news and the like can make it a little different.
As a gamble he can do trading, but as a trader we only use the tricks to save the money, Tricks means skills. A gambler can afford a every lose but as a trader, we can't afford and accept the big lose. But about the differences of gambling and trading, then i will choose trading is better. Because trading not always give us lose, but gambling if we play it with randomly then sure we could win only 1% from it.
Yeah the success ratio in gambling is very low and majority of times results will not be in your favor but in trading if you have good skills and strategies then you can make good profits at regular intervals and even its less risky in compare to gambling.