I agree that most popular cryptocurrency is Bitcoin. Nothing has changed from 2009. Bitcoin is the most popular cryptocurrency since 2009.
But Ethereum and BNB in 2021 raised more then Bitcoin.
So one question is what is the most popular cryptocurrency and another question is what is the most profitable cryptocurrency.
You are right. Now many people are looking not for the most popular, but for the most profitable cryptocurrencies to earn more money on the price growth.
Bitcoin is the most stable cryptocurrency. A lot of cryptocurrencies including Ethereum and BNB growth in price more active than bitcoin.