Gambling is not preferable one to anyone in Bitcointalk. It wasting our money, Investment in bitcoin also not working good at this point because price is fluctuate now. Better to buy bitcoins and We can make profit in future.
Definitely gambling should not be considered as one way to earn money because we all lose in gambling, investing now is great because the price is cheap so you can buy more with your money's worth, but I agree with you that it should be for the purpose of future investment as you have more chance to get the most of the benefits.
Gambling will take away everything that you have, its better to invest your fiat in buying bitcoin and hold it for the future to earn some really great and higher profits from it.