According to a recent World Bank study, fisheries make up one quarter of Mauritania's natural wealth, but the waters off the country in north-western Africa are being overfished. Foreign operators pull out the lion's share of the catch - sometimes legally, sometimes not; suspicions of corruption abound.
Doing business entails certain risks. You make a big investment of money and time, and you hope that your gamble pays off. Maybe people will come to your restaurant. Maybe they will buy your product. Maybe they will contract for your services. But you can't be sure. You've taken out loans on the expectation that if you build it, they will come.