Its an online/internet currency . You use it online you store it online in a wallet. There are lots of cryptos in the world. We say dollar, pound,euro,yen, birr....mnamn...in crypto we have Bitcoin,etherum,litcoin, doge,BTC cash, USDT, tron.....betam bizu alu(they are not country based tho). You use them online you save them online in wallet. Bizu wallet providers alu. Ofc as a cash withdraw lemareg lr transfer lemareg they cut some percent as a fee. Currently 1 Bitcoin is around 38,000 dollar i think. But note that you can't have cryptos for free after they are exchangeable into cash. You have to buy it or find some other sites that pays with crypto when you complete a task. But don't ever forget that scammers are every where. I advice you to google more before you do anything. And there a couple of legit cryptos that are being mined(collected) for free untile they are available for exchange. Let me know if you have any question...you can dm