Block chain has arisen into everyday life more than a decade. From the beginning to today's capital market, many people made much money, and others lost much. Many believe it, many wait and doubt it. No matter what kind of attitude and view you hold today, it will not stop the development of the products of the time. From a decentralized idea, Bitcoin, a cipher code with payment, was gradually born, and we realized the significance of the existence of block chain, thus leading to Ethereum being open and exploitable, and then changing from a truly decentralized distributed ledger into the empty storage. That is today's IPFS and we need to pay more heed to its existence, for the real 3.0 era is coming, we wait and see...