The lack of vision panned out. Bitcoin is not a good currency, it is not bringing us into a decentralized land of milk and honey, it is environmentally ruinous, and all that it has accomplished is creating yet another financial gambling market. Broadly speaking, we already have enough of those. And I guess you can still use it to buy drugs. (Although, with $10 transaction fees, probably not. The drug folks would kindly prefer it if this whole bitcoin mania could blow over, and people could go back to gambling in Vegas, or on out-of-the-money GME calls, or whatever, so they could do their business in peace.)
Of the bright predictions of the future made in 2012 about it, the only relevant one that came to fruition by 2021 is 'Many people speculating on bitcoin made a lot of money.'
Of the dour predictions of the future made in 2012 about it, only the ones I listed came true.