I think it's too early to talk about the king of the crypto currency at the beginning of the year. In our time, a lot of new crypto currency is created and therefore it is difficult to determine. But, if you do not take into account newly created crypto-currencies, I think that after all, ETH leader is among the crypto-currencies.
So far for me I think its still bitcoin. Even though bitcoin suffers now bear market but its still a strong coin. Perhaps ethereum having a good run but its still not enough to become king of all crypto. In the next 3 years maybe if bitcoin cannot recover.