https://www.theguardian.com/global-development/2018/nov/05/should-paraguay-invest-its-energy-wealth-in-bitcoin-mining-or-fighting-poverty > The Itaipú dam is already enriching some, and they believe the country should invest more in cryptocurrency, while others argue it should spread Itaipú’s bounty more widely > Shotgun-toting guards patrol an anonymous warehouse on the outskirts of Ciudad del Este. Perched on the triple border where Paraguay meets Brazil and Argentina, the melting-pot city is often associated with smuggling, cartels and drugs.