cointelegraph.com
https://de.cointelegraph.com/news/one-fifth-of-businesses-in-el-salvador-now-accept-bitcoin-nber-study
Bargeld, Bitcoin (BTC), El Salvador, gesetzliches Zahlungsmittel, National Bureau of Economic Research (NBER), Politik El Salvador, Studie / Bericht / Umfrage / Statistik, Wallet, Wallet Chivo