Bitcoin is so popular that I think it is as popular as paypal right now. This project is unique and managed to take power out of the control of banks and organizations. Bitcoin is great for transferring money in large amounts and is better than banking systems.
The credibility of Bitcoin depends on its demand, and given the current popularity of Bitcoin, the demand for it is increasing every day, and it is far from the mind that Bitcoin will one day reach a price of 0.
Of course, considering the halving and the fact that the price of bitcoin must be above about $ 7,000 to give a good reward to the miners, in my opinion, if the price reaches less than this number one day, the end of bitcoin can be considered.