Even after Ten years still Bitcoin is used by Geeks and majority of common citizens doesn't seems to use Bitcoin as a currency or even for trading purposes and I think this situation has occurred because still it is not approachable and that is because even it has all the features for a proper usability majority of people doesn't see Bitcoin as an usable currency for anyone who has basic technical knowledge which is not true but in order to change this situation and make Bitcoin more approachable to common people how its path should change in the future both technically and socially to convince it is a currency for everyone
We can't blame other people who don't believe in Bitcoin and its purposes because of the negative news published in the media. Furthermore, other people just wan't the easy way to spend money since they are earning fiat, paid in fiat so expect them to spend in fiat. But for those who get paid in Bitcoin, ofcourse they will spend it, use it and trade it.