The promise of Web 3.0, which I introduced earlier, depends to a large extent on the blockchain. So let’s break down the blockchain. The easiest to understand the definition of a blockchain that I found is from Coinbase: At its most basic, a blockchain is a list of transactions that anyone can view and verify. Think of the blockchain in terms of "block" and "chain". Block, in this case, is a digital record of a transaction. Each block is a transaction. A series of blocks tells the story of ho...