Just like in subject. How do you converting cryptocurrencies into cash? For example in Poland I can convert in so-called bitcoinmat from page shitcoins.club. I don't know how is it in other countries, so please reply. Thanks 
There are lots of ways I can convert my Bitcoin into cash. There are local exchangers in my country that I can meet face to face and do the exchange with them. I even know a lot of them to the extent I don't need to meet them anymore, rather I just send them a message and request for their Bitcoin wallet address which I then transfer some Bitcoins to them and they will pay money to my bank account.This is my favorite way of converting Bitcoin into cash and it doesn't cost me. Then another way I can do is withdrawing straight from my Bitcoin wallet. I just hit on the withdraw and the money comes to bank account within few minutes or some hours. This method cost me some fees but it is not much. Another way can be by making use of wallet debit card.
I have been using luno for a very long time now and what I just pay is maybe the exchange fee, once I pay the exchange fee, they pay me exactly the amount I request in the proper fiat equivalent, the only challenge I have with them is that their exchange fee is quite high which is still better that what I will get when I exchange behind the counter.