Presently, i am not thinking of the coin that will rule between these two. Although, i am a holder of these two coins (bitcoin an ethereum), but i would prefer to fiocus more on other altcoins that will bring me substantial and reasonable profit. Had it been i have enough money on me to get more of bitcoin and ethereum, they might have been my main choices. Nonetheless, i believe bitcoin has every tendency to continue to rule until it reaches its threshold.