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  • Leifan Wang thinks this is interesting:

Blockchain 1.0 is currency, the deployment of cryptocurrencies in applications related to cash, such as currency transfer, remittance, and digital payment systems. Blockchain 2.0 is contracts, the entire slate of economic, market, and financial applications using the blockchain that are more extensive than simple cash transactions: stocks, bonds, futures, loans, mortgages, titles, smart property, and smart contracts. Blockchain 3.0 is blockchain applications beyond currency, finance, and markets—particularly in the areas of government, health, science, literacy, culture, and art.

From

Cover of Blockchain
  • Preface
  • from Blockchain
  • by Melanie Swan
  • Publisher: O'Reilly Media, Inc.
  • Released: February 2015

Note

Bitcoin 3 stage.