10 Best Blockchain Courses are listed below, we think following online courses are the way to learn blockchain fast :

Sr.No Course
1 Blockchain and Bitcoin Fundamentals
2 Blockchain A-Z™: Learn How To Build Your First Blockchain
3 Ethereum and Solidity: The Complete Developer’s Guide
4 Learn Python by Building a Blockchain & Cryptocurrency
5 Blockchain for Business 2019: The New Industrial Revolution
6 Become a Blockchain Developer with Ethereum and Solidity
7 Build a Blockchain and a Cryptocurrency from Scratch
8 Build a Blockchain & Cryptocurrency | Full-Stack Edition
9 Become a Blockchain Expert (BE I) | Bitcoin & Cryptocurrency
10 Blockchain Programming in iOS Using Swift
11 Learn Blockchain Technology & Cryptocurrency in Java