Twenty years ago, when Mitchell Elegbe founded fintech firm Interswitch in Nigeria, it transformed the company into a major fintech hub. Today, the fintech industry is expanding its horizons to include West African nations where a new generation of citizens are participating in local and global economies. A recent GSMA mobile economy report, for instance, showed that mobile adoption in West Africa has nearly doubled from 28% at the turn of the decade to 47% in 2017, and the reach of the mobile money sector is 13 times wider than local banks. In Ghana, telecom operator MTN launched a mobile-money…