Great tip @cryptosteemman! I would add that for anyone having any issues to make sure their privacy settings on Facebook, Instagram, etc. are set to "public" for their profile image at least. This will ensure that it is able to be viewed by users outside of the particular social network and for those users that are logged into that network that are not part of your friends or followers. Also as @rathoz41 stated you will likely need a reload of the page to see your newly attached image link.