I think $4K is still very far compared to the current bitcoin price of $45K, of course etherem can't compete with BTC, let alone take over the popularity of BTC, because BTC is a priority investment by everyone.
Actually, this value cannot be used as a reference for comparison and competition because each coin has its own basic value, so the size of the value cannot be used as a benchmark in this case, even though both of them have very many fans now.
If the reference is seen in terms of value, it is very unlikely for Ethereum to catch up with the deficit from bitcoin, Moreover, the value of Ethereum is still very far below Bitcoin, even I dare say it will never happen. If we talk in terms of popularity and market demand, it might still happen. But again I reiterate, bitcoin will always be the king of cryptocurrencies and need a new king to replace the old king.