There will be definitely impact on the bitcoin price if it happens in reality. However, that will be temporary for sure! who have already invested millions of euros to setup their mining operations, they will simply move out of Europe and set up in a crypto friendly nation. It's very similar to what happened in China.

So I think a temporary impact will be seen in the market if the EU decides to go ahead with the ban but we should be able to come back on track within a short period of time.