I asked that because I want to keep my EU citizenship and rights of freedom of movement after Brexit
But nothing changes. Get a Right of Abode card if you want - Stalyt Pobyt).
The Poles can't tell you to leave, like the UK can't tell them to leave.
I am more worried about the weather forecast for the weekend. There is no risk from Brexit for freedom of movement, especially when you have already "moved"; nobody knows what is going to happen, but the politicians and the lawyers will be kept very busy and everybody in government will earn handsome overtime..........
If you are worried about investment, go on and buy that house or whatever. This is not communism - nobody is going to repossess it. Only the banks can do that:)))