Put everything on Ethereum because in few weeks from now, ethereum fork would have been over and the result of fork will definitely spark a bear run or bear party! I am sure the increase in ether price will be sustained and when people realize the opportunity that fork hss created, people will jump in to buy more ether!
I doubt that the price of ETH will fly up after the fork. Most likely people will start selling Ethereum after that and the price will go down.
People do not learn from their mistakes, so the collapse of prices in 2017 did not teach many to properly manage coins, they will sit and wait for a big profit until the last moment. Few will sell