The more money you are willing to invest, the more you can lose, i would therefore advice to make low bets.
How can you lose from what you invest? Moreover if you invest on some huge gambling site with a huge wagered because in the end house is always winning no matter what you do. But it will sure take time because this is very long investment if you place it on gambling site and it still is a good way to get some profit
i think with gambling we are unable to earn profit, no one here have any proof that they have earn bigger amount with gambling and they are getting a steady earning from gambling, you yourself not have any proof that with gambling we will earn a good profit.
I think someone out there can earn profit from gambling, but he never show off. I also lost so much money on gambling, around 3-5+ bitcoins because of gambling.