I'm search many thing about BTC on this Internet. And i see many people call BTC is blockchain 1.0. Why do people call Bitcoin is blockchain 1.0?
What is blockchain 1.0? And now, What is version of blockchain?
This is a good article to read for this question:
https://thoughtblotterr.wordpress.com/2016/04/25/blockchain-1-0-how-bitcoin-works/Essentially, blockchain 1.0 is Bitcoin. To delve deeper into it, it's the cryptocurrency implementation that's related to cash and transferring money.
Blockchain 2.0 has to do with contracts, think Ethereum.
Beyond that I'm not too sure, but I think Blockchain 3.0 refers to the altcoins in different parts of the world, so they're applications of blockchain technology in many fields.