The success of Ethereum completing its final testnet merger might provide an opportunity for Ethereum to gain support from its fans and attract more investors. This is interesting because if we talk about price predictions, we might see a price reversal from the current price to the high price but that is also just a prediction because we never know how the market sentiment will be with the news. But we will see what happens next and if the price is going to increase, get ready to welcome it and if that is your target price, then sell it.
I think even more interesting questions where those miners will go after the switch, one possibility is ETC which means ETC may also pump in terms of price