The market sell off is didn't affect you only, it has affected everybody, the reason why Ethereum is dumping right now is that some people are speculating that the merge may not go successfully and the traders are selling, and bitcoin is also dumping since last week but holding Ether is not bad for your portfolio, it will grow very well in the future.
If you want to hold or diversify your portfolio, add Solana, Avalanche, Fantom and Harmony, those are the layer 1 protocol projects that will become the future of cryptocurrency because they are the one that follows Ethereum right now and not shit coins.