Maybe it’s LTC. This also come to my mind.

Btw In my opinion the next one should be Ada Cardano according to recent market. To be honest without the stable coin like USDT,USD,USDC,BUSD etc all have not the stability. Because I think stability means the coin will go sideways and got the price stable little upside. Will not pump/dump huge in a day.

But yeah I can consider BTC & ETH are them a little bit.