ETH is much more popular and useful than ETC. But yes, you can invest a small part in it as a diversification strategy and hope for a bull run in future. But don't invest a big part of your income in it. It's just not worth it.
I agree mate, eth is a promising altcoin and you can check that coin rates in coinmarketcap.com if you want to monitor it.
There were lots of sites that you can use to monitor eth.
It is worth to invest some of eth that can satisfy you, if you want a big hit in the future you can buy eth
little by little.