She discovered that she can use bitcoin to top up people’s phones on bitrefill.com, and she can charge for this. For every 100 dollars she receives in bitcoin, she gets 120 CUC in cash from her friends whose phones she tops up. Ira is quite pleased that she has found a way to arbitrage the currency exchange. If she got paid via Western Union, she’d lose 15% of what the agency pays her. This way, she makes 20%.