Re: If you knew Bitcoin would never change in value, would you buy it?
Yes, because regardless of Bitcoin changing its value, we know that the future of all fiat currencies is to go down. 
Btw, that condition by itself implies that Bitcoin will continue to go up.
Good point. How can Bitcoin not change its value when all fiat currencies are losing value? You will need more fiat do buy Bitcoin as time passes...Btw, that condition by itself implies that Bitcoin will continue to go up.