If nem was such a "fuel" for world economy, people would write apps for it without getting paid by nem developers. They would make profit by either selling that app or other means (adds) like most other app developers do. Many people writing software/apps for bitcoin (and now ethereum) don't get paid by bitcoin foundation or ethereum developers. They see a future in it and are speculators who think it's the right investment in time/money.

Like all said months ago, close to 50% of nem weren't even distributed, so market cap was totally fake,  and the prices could only go down (not up) as these coins are dumped in months and years.