There is no one particularly easy, else all gambler's would have moved to it and the odds fell to the ground.
My favorite sports are Tennis and US sports, Considering the number of statistics and details available, it enable the player to make a better prediction generally, but every other sport can be better for these experienced in it.

I am using Ethereum now together with BTC and even though I've no intention of changing from BTC to anything else as main currency, I've to say I'm very satisfied with ETH both technically and on the price term... The blocks and 6 confirmations takes minutes, low fees, quick TX and many additional features, as well as a big rise in price same as BTC but in Altcoin community it's impressive.