I never consider the ETH gas fee as one of the indication of market movement, if anything it means that less people are doing transaction in the market especially the ERC-20 coin market. And as far as I know the price of Ethereum has never been affected by its gas fee, or vice versa. 
[yes true, many other coins still have high transaction fees. Due to volatility in the Bitcoin market, alternative sources of investment should be looked for. Recently I came across Mallconomy, a great earning site. If you are interested in knowing more, feel free to comment]