I think those people who are not joining bitcoin ,are the people who believe that bitcoin is worthless, but to the people who really invest on bitcoin and understand the concept of bitcoin and cryptocurrency would always believe the worth of bitcoin in the coin market cap and the entire digital business.
People who consider bitcoin unworthy are people who have fallen behind, where the future is a digital age. The price of bitcoin has been thousands of US dollars, but they still think bitcoin is cheap. And they don't know that there have been lots of trades that accept bitcoin for payments all over the world. They also don't know, bitcoin has given birth to a lot of millionaires who have succeeded after investing or bitcoin trading.