Gambling is illegal in many countries around the world. However, since you're using cryptocurrency to gamble, and not fiat, crypto-gaming is a grey area. Currently, there are no governments in the free world that crackdown on crypto gaming online. However, to take advantage of the unregulated crypto-gaming market, you'll need to invest in ETH or BTC. Unfortunately, financial regulations surround the buying and selling of crypto and what it means for your assets and tax return. Make sure you speak with an accountant before converting any winnings into fiat currencies.