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. 
I'm also surprised because America is a developed country and maybe not all developed countries know about Bitcoin. Hmm, Bitcoin have is launch a long time ago and there are still many people who don't know, but you don't need to be disappointed because you can explain to your clients what is that Bitcoin or Ethereum and what it does. you will get merit from me if your reply makes me interested or likes.