ETH has a very strong roadmap for long term development and the holders must hold it for the long term portfolios and they must be patience as the development needs a lot of research and it's not like a magic when you can do everything just in a night. Ethereum is a very suitable coin for long term.
we have seen how ethereum lasts very long under any conditions that occur in the market. for people who have already seen ATH, of course, they have confidence that future ethereum development can achieve that again.