Trading and Gambling can double your money fast if you are lucky but is too risky. There are many times to get lose than to get win. For me i suggest not to engage in that because its hard to get bitcoin then you only lose in gambling or trading it sucks.
There are more chances that you will loose in gambling, but same doesn't goes with trading, you can make good profits in trading if you are aware about the market trends.
Yeah you are right mate there are more chances that you are going to lose in gambling where is there no guarantee in wining because sometimes theres a chance that the losing chance is 80% and the wining chance is 20% and sometimes if we lose we are going to chase our lose to bring back our profit