Is 10 years that long they will be long gone after that?
I think Ethereum will also stay for a long time. Given they are already updating to 2.0, if it goes successful and the fees and speed goes back to normal then many users will be overjoyed once again.
For now it may look bad, but let's see after the update.
I think ether gonna stay for long, even if the price is falling it will still be around considering so many merchants already integrated ETH to their payment gateway etc.