This article is a rewrite in English of one written in October 2017.What is a hard fork? What is the difference between a soft fork and a soft fork?Forking is all the rage these days. The word "fork" means "permanent split" in the crypto world. We thought Bitcoin activated SegWit with a soft fork, Bitcoin Cash hard forked to create BCH, and a Bitcoin Gold hard fork is coming this month. It's not just Bitcoin that is forking; all coins are forking; Ethereum also had a hard fork this month...