you can try nolimitcoin,it designed specifically to power fantasy sports:
https://nolimitcoin.org/
one them coins that might be on to something,almost 12 mil $ capitalisation
you can bet fantasy sports using this coin here,for example:
https://www.cryptofantasysports.com/

as for the more conventional fantasy sports crypto betting try this site:
http://www.bitcoinfantasysports.net/
there are several casinos that accept fantasy sports betting on the list (haven't tried any of them,to be honest)