How about a theory that Poles are bad traders?
Jokes aside, Poland have one of the highest number of educated people that are fond of new technologies. The demand in unsure times is higher than in the west.
Yes sure. The racist theory seems always valid. Its always wrong though. Even the black people are made mess with their economies by predatory enitities like IMF that had made a tone load of unpayable loans unto them.
More demand from Poles might be the case. Sure. But it does not explain why most of the time PLN/BTC and USD/BTC are almost even. Sometimes the price happened to be realy weird like 60 usd difference in value for the same bitcoin. And it was usualy just before the dumping of bitcoins on some big exchange.
Low volume exchanges have higher prices
That is the point of this topic. But why is that? Saying that there is not enough liquidity is a double edge sword. Why would they be higher instead of lower. That seems logical, but its just an illusion of an argument.
Also - exchanges in places where there are capital controls (like India) have higher prices.
That is not the case here with Poland.
The differences are because it is hard to arbitrage.
I wouldn't say its hard to arbitrage. Ofcourse its harder to arbitrage changing one currency to another. But there will always be someone willing to make few bucks on arbitrage like myself so eventualy the price should even itself out. Thats why I think the market is manipulated to keep the price low and that is kind of bullish imho.