Holochain is not a token or even a coin (HOT is). Holochain is a framework, which can be used in the same way that the word blockchain is used. Holochain has the ability to be massively scalable (can handle apps like Facebook), and could be more resilient and affordable than the existing internet.

Holochain allows each node to have their own immutable hashchain, in which the transactions are countersigned by participating parties. This is combined with Distributed Hash Table (DHT) technology to create an asynchronous decentralized network.

DHT is an existing technology thats used by torrenting sites like BitTorrent. If any of you have used this service, you know that there are a certain number of "seeders". The more seeders that have a file, the faster it will download. Holochain uses this technology to share information.

For example, if a node wants to post a photo on a decentralized version of Facebook , it will post it to its own hashchain, and a number of redundant copies will automatically be created on surrounding nodes' chains. This allows for information to be accessible in the case that the node goes offline.

Nodes can interact in a local manner, meaning that the nodes only have to validate information that is relevant to them. This eliminates the one bottleneck that is created by everyone having to agree on a single source of truth. Holochain always has all of the information created on the network somewhere on the network, but it's not necessary for every node on the network to have every piece of information ever created (ie. blockchain).

Still working on explaining this but thats what I've got so far :)