There were people paying $19k for bitcoin 2 yrs ago, there are people paying $35k for bitcoin now.
There were people giving up kingdoms for tulips
There were dozens of speculative bubles in history and scheme is always the same.
Greed blinds people. When frenzy starts nothing can stop them, they wont lesson.
So... Yes, you will sell it for £50.
I would say the more it will cost, the easier you will sell it. Once inflow of speculators start. Scheme is always the same "I must buy now, because tomorrow it will cost twice that"