Seeing the current scenario, which one of these can be the currency of future which will be acceptable worldwide?
There are other coins that are able to overtake the ETH, so neo do not consider one of such. Another competitor with its technology and good development, we all know the successes of the Chinese in any sphere of life. He is promising but not able to compete with ether and bitcoin.
I agree as of now ether is far more promising but I see huge potential in NEO to capture the markets other than china. Usability is one aspect and profitability is another. Neo>Ether in the latter aspect, I think. so It is a tough competition in coming years.