After the run last year? Money. I feel people have been flocking to Bitcoin purely due to FOMO of making money. The amount of people who brought the subject up to me at work, at family gatherings, socially, in the hairdressers you name it... and when I ask what they know about Bitcoin and blockchain?! Their blank faces scare me. It became 'popular' for all the wrong reasons, too many people trying to get rich quick.