Indeed, Binance is a leading & respected exchange in crypto industry with highest trading volume & largest variety of trading pairs available on its platform. The permission granted by Polish government to Binance to provide investment and trading services to polish citizens, is a positive development, which is welcome move towards creating awareness and demand of crypto currencies in the country, however the price of Bitcoin and other crypto currencies is influenced by many factors, including overall technological development & advancement in crypto space, condition of global economy, interest rates and market sentiments, driven by technical factors like oversold or overbought position of market.
I do agree that it would be good for Poland and not just for Binance. In fact, this is more important for Polish people than it is important for Binance, because in the end Binance could have gone without Poland and they would still be the biggest exchange in the world, but this way Polish people would get to use the biggest crypto exchange in the world without worrying about using some terrible exchange.
Definitely a good thing for them and definitely would help out a lot for everyone as well. I am not saying that there is a trouble with anything regarding Binance being accepted, because it would be a good thing in the end, but it is better for Poland than Binance for sure.