I think Hardfork is not the key to increasing prices, to be able to raise ethereum prices at least bitcoin prices should be able to rise first because the price of ethereum movements follows the price movements of bitcoin.
I agree with you, Ethereum's movement follows the movement of Bitcoin. But we see what will happen after the fork, I think the fork will bringback up of Ethereum price.
Of course, all altcoin in this market depends on the price of Bitcoin. If the price of ETH increases, the price of BTC must increase sharply, the hard fork only helps ETH increase by 10-15% and of course after hard fork the price of ETH will fall again