The lack of knowledge and the misunderstanding regarding its backing technology were the one which makes users to stand away from bitcoin as well other digital currencies.
There are hundreds of millions of tech savvy people worldwide but only 1.2 million Bitcoin addresses that have any meaningful quantity of bitcoins in them. There's another 1.2 million that have dust in them so they aren't buying anything with those addresses. In 6 (six) years Bitcoin has attracted less than 3 million people tech savvy enough to use a Bitcoin smart phone app and only 1.2 million active users.
Pokemon Go was released on July 6, 2016 in only North America and already has 21 million daily smart phone users.
Apple Pay is a piece of shit payment system that only works on Apple phones. It was released less than 2 (two) years ago and already has 4 million users.
Google Wallet is only available in the US, has only been around for 4 (four) years, and has 27 million active users.
People don't care for Bitcoin and it's not because they're too dumb to use it.