The other day my barber asked me whether he should put all his money in Bitcoin. And the truth is that if he’d bought Bitcoin, say, a year ago he’d be feeling pretty good right now. On the other hand, Dutch speculators who bought tulip bulbs in 1635 also felt pretty good for a while, until tulip prices collapsed in early 1637.

So is Bitcoin a giant bubble that will end in grief? Yes. But it’s a bubble wrapped in techno-mysticism inside a cocoon of libertarian ideology. And there’s something to be learned about the times we live in by peeling away that wrapping.

If you’ve been living in a cave and haven’t heard of Bitcoin, it’s the biggest, best-known example of a “cryptocurrency”: an asset that has no physical existence, consisting of nothing but a digital record stored on computers. What makes cryptocurrencies different from ordinary bank accounts, which are also nothing but digital records, is that they don’t reside in the servers of any particular financial institution. Instead, a Bitcoin’s existence is documented by records distributed in many places.

And your ownership isn’t verified by proving (and hence revealing) your identity. Instead, ownership of a Bitcoin is verified by possession of a secret password, which — using techniques derived from cryptography, the art of writing or solving codes — lets you access that virtual coin without revealing any information you don’t choose to.