Copying the whole article doesn't fall under 'fair use' of copyright law and does not give the reader a reason to visit the site where it is (we presume) published by the author.
Tip on sharing content: cointelegraph.com: Blockfolio.com Releases Privacy And Data Statement Amid Growing Concerns
We also suggest adding some original insight or comments to add value to the post. It starts a conversation, gets readers interested in following you, and prevents it from becoming spam when multiple people post the same news articles.