This is true. As it's true not to be related to bitcoin rises. Ethereum has its features to determine its value whatever the condition of bitcoin despite it's the most marketcap with more than 40% from the global. Ethereum is the second since 2017 and didn't lose volume despite all the network transaction related issues.
These two coins are representations for other existing coins, usually the strengthening that occurs against these two coins can affect good hype for other coins, regardless of the problem of expensive transaction fees, or high purchase fees, but we can be sure that everyone is after both coins. this, due to high hopes for a good investment only in these two coins, regardless of how the ongoing market reacts to them