Once Russia took the similar stand on cryptocurrency. After long term research they found the blockchain technology to be promising to make the financial infrastructure perfect but they stood against bitcoin. Same seems to be the scenario with Poland banks adopting blockchain technology, and gradually these financial institutions will move towards cryptocurrency usage.
Something like this really interest many of crypto lovers, the actions that they are taking is different from what they've stand before, precisely favors the blockchain system and if they will proceed and continue to developed system like this, popularity will grow and more and more people will be known about this and will start believing, crypto will again benefits from such actions that this country has made.