Are profitable sports betting luck or skills?

Definitely a skill. You may get lucky once or twice to make money on sports betting if you rely only on luck, but for long-term successful sports betting I'm sure you need skill, or at least a good sports betting consultancy with you. I have the skill, and I also pay one of the best sports betting consultancies (Megalodon Betting Tips) to give me betting recommendations and analysis so that I really manage to make a profit every month, but I'm also aware that most people don't succeed so it's skill very important in betting.