I think this change might actually push the price of BNB up especially considering how much more you can trade for with it if euros come into play.
It will definitely push the price of BNB up, which has been steadily increasing over the last few months despite the bear market we are in.
It is also good news for all altcoins, as it means a direct route of purchase without having to go through BTC first. The sooner altcoins decouple from bitcoin, then the sooner the market stops behaving like 1 giant coin.