Yeah, no doubt that the fees for transactions are no longer cheaper but one of the reasons why many have liked it is because for having a very cheap network fee before.
Well, time changes and when a network has promised before to be cheap in transaction fees can no longer stand its promise because of how clogged and high demand transactions on it.
We should not use transaction fee to invest in a coin because if the coin or the project will cause traffic in the future then definitely it create network congestion and once the network of the particular cryptocurrency is congested then the fee must be increased to meet up the traffic. Now that Ethereum transaction fee is very low is because the number of users in the Blockchain are not much as Bitcoin. Bitcoin is recording millions of users while Ethereum is recording hundreds of users so the different is always clear.
If anyone is investing in Ethereum let the person should invest in Bitcoin too because the time when you want to harvest the Ethereum Bitcoin has already given you more profit already.