Git is called a
distributed VCS for a reason. And a blockchain is of course a Merkle tree. This part of the basic ideas behind crypto-coins is useful without doubt. But that's not the point.
The actual interesting and novel thing about crypto-coins was solving the "trust problem" of a distributed ledger. But this solution, to be honest, is quite clumsy: PoW. But nobody ever found a better solution until now. Any other proposal is kind of centralized somewhere.
The question that needs to be asked is now "Do we really want, or even need, a fully decentralized 'value moving system'"?
In a world where you could ultimately trust someone else the answer would be clearly "no".
But when there is on thing to learn about humans than it's "never ever trust someone ultimately as you're going to be scammed by those people eventually". Just look at what government do around the globe…
As long as this fact doesn't change (and it won't change until we create a new species of intelligent beings, better than us) there will be room for something like BitCoin. And as those are distributed systems there even doesn't need to be any agreement on that point.