I think with low gas fees, I rather buy more ETH than other tokens in its ecosystem tho. Alts are too risky for now so low gas fees and fast transactions don't seem to outweigh the risk of it. Especially when ETH PoS is also around the conners.
It's really worth investing ETH these days not just because of its low fees but also it's potential to strike high when the market gets back to normal. We all know that ETH has a huge potential and buying it would pay off in the future. Risking in ETH is better than nonpotential coins regardless of the low gas fees.