The doubters will always doubt. When the price goes up they say "See it's a bubble!" and when the price goes down they say "See it is worthless!"
The rhetoric follows the sentiment of the market. Even when BTC dropped to under $200 in 2015 I was still using it on nearly a daily basis and never once believed that it would simply go away or that it was a fad. I have been a true believer ever since I discovered BTC in 2013 (thanks to NPR radio).