1) gambling is a system based only on chance. trade with knowledge and experience is to take the chance with you. We can improve ourselves about trading, but this is not possible about gambling.
2)both have risks if we don't use deep understanding,especially gambling, gambling must be avoided no matter what the reason, because only the losses we will get.
3)For becoming a successful trader, you must have to gain a lot of knowledge, you need to learn technical analysis along with fundamental. It requires a lot of time as well.
On the other hand, gambling requires you to have some specific knowledge only and couple of days of practice. It will make you a pro gambler.
Both contains the same risk though,
4)Gambling at some levels are stakes on probability and the chances which you may have at such periods. As right choices and timing are the base elements on gambling. As trading is an open market when looking at Cryptocurrencies,as no backdoors are in trading. As trading too is also on timing and sense of the right coin and the stake which you put on it