Everybody's assumption is irrelevant to what's actually happening or at least our assumptions can't affect the price of bitcoin. Everyone's thinking that the price of bitcoin will never go down because most people either don't want to face reality or is too optimistic to see the reality. What market is never going down? There will always be a market correction and dumps will always happen.
Everyone says that the price of bitcoin will increase even more in the future but no one actually knows that. No one can confirm if the whole bitcoin things is actually decentralized or there's just a group of people making money out of all this. I know that the sleep of reason creates monsters but obviously, we can't confirm all this.
This pretty much sums it up -- nobody knows jack shit about what is going to happen in the future. It's best to be flexible. Dogmatic traders tend to run into a brick wall eventually.