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. 
Not all people in the whole world are already aware about bitcoin because some of them doesn't have gadgets ,computers or modern technology where they can find the word Bitcoin. So,don't be surprised because even here in my area ,a lot of people doesn't know what is bitcoin and where to find it.