Bitcoin is priced the way it is now because people believe in it. You should always invest in something you believe in otherwise why did you invest in it in the first place if you are not 100% convinced that you were gonna get something out of this investment?
Belief alone isn't enough, especially when it comes to the certainty that has brought Bitcoin this far. Unless you're talking about faith, every individual needs to be certain before they start. Bitcoin's current price isn't solely due to faith; there are other factors that drive Bitcoin to achieve perfection in positioning itself as a highly sought-after asset. I agree with the idea of faith when someone talks about involvement, and without faith, they certainly won't take any investment approach, including Bitcoin itself but for the price it is not determined at all just because of a Certain or believing in it.