No new kings are out of the question right now.Cryptocurrency need to firmly take its place and to use it as a means of savings and unit of calculation.It will take a long time...of course, it is possible such projects as TON or cryptocurrency Facebook will be able to bypass bitcoin in the future.
Ethereum platform will be developed further, and Bitcoin will stay the king. Probably, very good altcoins will appear but if it happens, we might not even see it. I love ETH and BTC and believe in these cryptos.