I think we need decentralization and independent money. Even if BTC ends up disappearing one day it has shown us what to do. That we can have independent money and that the governments and banks hate this idea of us handling our money without their help and control.
Obviously we'll be able to survive without it but there will be new ideas and projects and ultimately we will win. The need to be independent and self sustained is among basic human instincts. Now that we know it's possible we'll make it our goal. You'll see.