Actually, that number is higher than you think. Check out this infographic, where about 10% of people have invested:
https://www.statista.com/chart/15137/how-many-consumers-own-cryptocurrency/I think a ton of people heard about crypto, but we're entering a new investment phase for smaller people with this price drop which makes a lot of sense. Blockchain will live on whether or not bitcoin rises again in price.
Yes, the blockchain will be used everywhere. This is beyond doubt. We all know that most of cryptocurrency will eventually die, others will take their place. But what will happen with the crypto currency, how will these evolve?