Without any doubt for me the next ethereum will be cardano especially now that the developers are making its one chain.
Cardano with the development and updates really attracts more interested investors, the chance is really high for this coin
to follow how ETH succeed, just have to wait for some time though as market still in the process of corrections and most money might be on hold.
I have doubt about the meaning of "next Ethereum". Is it mean coin that will be ranked next to Ethereum or coin that will replace Ethereum? If this means that the coin that will replace Ethereum, then I would say that no coin has been created yet that will replace Ethereum.
Interesting but valid, if we talk about same success in terms of good profits there are good coins to follow ETH,
But in terms of replacing or overthrown ETH, I doubt that there's new project that will remove this coin from the current position.