Sports betting is one of the best gambling games that i gained a lot of profit besides on dice game. yes you can also use altcoins. there's a lot of gambling site that's accepting a different payment . BTC, BCH, ETH and many more. In sports betting you must know the flow of the game in order to predict what will happen to the game.
Yes, in sports betting you earn a lot of money. But try other card games like poker. In poker your skills really go out and there are times when you will be intense. You can try to play it online in my signature campaign which is nitrogensports. And also play at the house of casino to find out what is the difference or feel online and offline.
Sports betting gives chances to win but not majority of the bettors are winners, there is no house edge but the site is operating profitably due the juice they are making on every bets. You can analyze the game and if you are consistent based on your record then I guess you have a good chance to make it a long term journey.