I had two clients from America I want offer graphics designing jobs for, I demanded my payment would be in BitcoinBTC or Ethereum. To my greatest dismay, they were dumfounded on what Bitcoin or Ethereum is. I am still suprised up to this very moment. 
That could happen. There are many people in the world today who know nothing about Bitcoin. But I hope everyone will be aware of it gradually. Because the promotion of Bitcoin is increasing day by day.
At the same time, it has gained a lot of reputation.