Si je ne me trompe pas, le Salvador a déj? réussis ? construire une (ou plusieurs) écoles avec les bénéfices fait il y a quelque temps, espérons que les autres prennent exemple!!

Dentist are typically old-fashion, it's already hard to sell them basic Facebook ads that would obviously increase their revenue. I think your best bet is to find someone that is already interested/knows about crypto, rather than trying to convince someone from the start.