No surprises here, Poland's banksters had been eager to capitalize on blockchain technology, while cannibalizing it.
Central Bank (PKO) is using blockchain ledger for "document keeping" (think: accounting soon), a digital PLN is in the works. Govt' funded social media campaign to depreciate BTC was launched already.
The story has been unveiling since at least three years, in 2015 local banksters were already blocking local bitcoin exchanges.
Moral: look up the story behind former Eris Technologies / Monax ( https://en.wikipedia.org/wiki/Monax ). There could be some non-trivial gems.
https://cointelegraph.com/news/banks-and-cryptocurrencies-global-evaluation-europe
https://cointelegraph.com/news/major-polish-bank-to-implement-blockchain-document-storage-system
https://www.coindesk.com/polish-exchanges-lose-payment-processors-in-bitcoin-crackdown/
https://en.insider.pro/topnews/2018-01-17/poland-developing-national-cryptocurrency/