Nobody really wins at gambling! Compulsive gambling can and does destroy lives just like drug addiction and alcoholism. It is just one more form of addiction (such as, pornography or shopping addictions, also not mentioned specifically in the bible). It is another sign of the moral decline currently gripping society these days.
Although the Bible does not mention the term gambling by name, the Christian principles are clear. Compulsive gambling for stakes that make a difference is a violation of the Tenth Commandment forbidding coveting. (I am not talking here about a private poker game among friends for small amounts of money for fun)
This commandment forbids greed and covetousness (Exodus 20:17; Deuteronomy 5:21). The apostle Paul labels covetousness as a form of idolatry—putting something else in the place of the true God.
The biblical proverbs, mainly written and compiled by King Solomon, are full of caution about placing the desire for riches and wealth in a proper, Godly perspective. Altogether, they advocate patience, diligence, hard work and trust in God as preparing for a successful life.
Here are a few of them:
• "The labor of the righteous leads to life" (Proverbs 10:16).
• "The blessing of the Lord makes one rich, and He adds no sorrow with it" (Proverbs 10:22).
• "He who tills his land will be satisfied with bread, but he who follows frivolity is devoid of understanding" (Proverbs 12:11; compare 28:19 below).
• "Wealth gained by dishonesty will be diminished, but he who gathers by labor will increase" (Proverbs 13:11).
• "Better is a little with the fear of the Lord than great treasure with trouble" (Proverbs 15:16).
• "Will you set your eyes on that which is not? For riches certainly make themselves wings; they fly away like an eagle toward heaven" (Proverbs 23:5).
Biblical principles show how to handle our material blessings in ways that lead to a better life, both materially and spiritually. I'd say if you have an addictive nature, it would be best to stay away from something like gambling, as the Lord is a Jealous God and won't take a back seat to anyone or anything.
Gambling is not the answer to our material woes. God is! He teaches us a way of life that includes planning, hard work and true wealth in the treasures of heaven.