Too Long; Didn't Read
Let’s admit it. No matter the level of ambiant noise, Crypto currencies interest very few people (that are *very* vocal). My best guess is that around 10/20m people in the world have actively interacted (buy, sell, use…) with them and much less in coding or building in/for the blockchain (10k to 50k developers). Compare that to 1 billion users in the word connected to the internet, using smartphones and different technologies with a couple of million of app developers give or take.