stable coin approach such as dai project appears to be very interesting . I think there will be an healthy competition between a lot of stable coin that will be good for the overall ecosystem, we need storage value , dapps protocol platform and stable coin in order for the economy to.blossom in the crypto world.
there won t be one coin which will be able to do all that by itself, I believe that inter operability between dapps ( Neo,eos, ven, eth...), storage value coin ( btc, ltc ,..) and stable coin ( dai, tether, ...) , payment ssystems ( lumens , omisego ..) will be the way this economy will grow.
let Free competition select the best systems !
Yes, coins in crypto economy will perform different function.