We dont even know if bitcoin is going to survive until then because it is possible that governments are going to try and bann it somehow.
No one can predict what the price will be even tomorrow, what about in 2026? Its more than impossible to know and you cant predict even a close price because there is a difference of 10 years and in this time the price could increase to 100k or go down to 100$.
You are wrong about this.
First of all, government can only ban trading sites or centralized entities that interact with bitcoin. They can never actually ban bitcoin itself, as a blockchain. Since it is decentralized, they can't just put up a seized notice like they did with Libertyreserve or egold and then call it a done deal.
Bitcoin will survive, as long as there is enough people using it. That is a fact.
But the second point you made was excellent. Nobody knows but I'd say that we'll have a pump in 2020-2022 and another pump around the time of 2025 due to respective halvings. So price should be higher than what it is right now by that time.