Ethereum being the coin that has the most opportunity to become the king of cryptocurrencies beat bitcoin, I believe even though the expensive transaction fees will not prevent investors from investing in Ethereum because of the large profit opportunity and certainly safer than investing in other coins.
although lately Ethereum is growing rapidly, but I'm not sure if ETH will be able to replace BTC as the king of cryptocurrencies because bitcoin is the only coin that first appeared on the market and until now bitcoin has also been widely used in the real world as a means of payment or used as currency as in El Salvador.