It certainly seems like a huge risk. I would never recommend it to others.
Another problem is that a manager from bitcointalk helped them to lunch a signature campaign which pays through referral link of each participant. It is like a free campaign to promote a new website that nobody trusts yet.
I see it is best to avoid this website until additional guarantees being provided. The service doesn't seem professional at all, and it is dangerous to promote or remain silent about it.
Gambling with real money is always a risk. And since the expected value is always negative, in the long run any such activity can be considered a high risk. The longer you play, the greater that risk becomes.
This service is unlikely to be any different from other similar ones. Those who want to reduce risk look for arbitrage opportunities in betting or choose platforms like Polymarket, where knowledge and experience can provide an edge.
Here, however, it is simply a game. And of course, a risky one.