A hard fork in cryptocurrency occurs when there is a permanent divergence in the blockchain, leading to two separate versions of the blockchain. This usually happens when there is a major change in the protocol that is not compatible with the existing blockchain.
When a hard fork occurs, those who do not agree with the changes can continue using the original blockchain while those who support the changes can switch to the new one. This can result in a split in the community and can lead to the creation of a new cryptocurrency if there is enough support for the new version of the blockchain.
Hard forks can be planned or contentious, with planned hard forks being upgrades to the network that are widely supported by the community, while contentious hard forks are the result of disagreements within the community. It is important to be aware of upcoming hard forks in order to understand how they may impact the cryptocurrency you are holding.
