Bitcoin is such a expensive and slow crypto to use for betting purposes, why do sites insist on using bitcoin only?
I would have imagined that they would prefer a quicker cheaper crypto to lure gamblers to their site. Imagine a tilted gambler trying to deposit hit last 0.5 bitcoin after losing his life savings and it taking 3 hours to get through. He would be tilt free by then

there is no Ethereum sportsbetting , the only bookie that offered Ethereum was directbet and their margin was very high that's why they used to accept Ethereum and other coins
the best thing to do is to keep your sportsbetting money in the bookie you using so you don't have to wait for confirmation
Betcoin accepts Ethereum but at this moment you can't trust them with your money
personally I find no problem betting with bitcoin cause I always keep like 10 units in the bookie I use