I strongly have the feeling that gambling is a luck game but individuals can master some games and become successful in those game that's all I know.
If you are planning to finance a gambler, you need to change your perception on gambling. Should be gambling can be won with skills, and not luck alone. Maybe there are times that we consider luck, but since it's a business, you know, financing thing is quite serious because you trust a guy to gamble for you or using your money, so you must be convince that his skills will bring your profit.