What "bigger missions" are you speaking of that would put decentralization on top of its list?
Replacing fiat definitively. To accomplish this you just can't put all the eggs in a Chinese basket and give it to XI JInping to keep it secure and act rational.
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Slightly off tangent, but I think for this we'd need to start from scratch either way.
Regardless of what growth potential I still expect from Bitcoin and some of the other cryptos I'm not convinced that a deflationary currency can work without an inflationary currency to relieve market pressure -- ie. without credit I'd expect economic growth to stagnate, and credit within a deflationary ecosystem is financial suicide. Note that I mean credit as in company bonds, not as in maxing out ones credit card.