Both are great coins considering their situation in the Coin Market Cap. ETH has heaps of value in it and an opportunity to form further and develop into a future Giant, its anyway can't be contrasted with what BTC can do as far as development Rate, BTC will in any case remain a superior decision and holding it for a more drawn out time presents higher odds of increasing more an incentive to it. Considering the rate at which ETH is developing, you have a decision of holding it for somewhat more, there are likewise higher odds of it picking up loads of significant worth before the year's over. so settle on a decision