Think of it as when lamplighters went out of business.
Or all that were involved in transportation on horseback.
We could add whale hunters and lots of jobs.
But most of those jobs were replaced by others along the economic growth,but BTC was supposed to free us of intermediaries which unfortunately at the moment it ain't happening.
In a perfect world with no bitswamp,coin.ph,inputs.io(lols),localbitcoins yeah bitcoin would be a job killer.