What is the point of Blockchain?

Related questions

1. What is the use of Blockchain?
2. Why should I use Blockchain?
3. Do all Cryptocurrencies use Blockchain?
4. How does a block chain work?
5. Why do we need a Blockchain?
6. What is the main purpose of Blockchain?
7. Does each Cryptocurrency have its own Blockchain?
8. Are Bitcoins illegal?
9. Does Blockchain change the world?
10. What are Blockchain companies?

Tags

1. #retroactively
2. #record
3. #ledger
4. #transactions
5. #blocks
6. #across
7. #cannot
8. #alteration
9. #involved
10. #distributed
11. #subsequent
12. #digital
13. #public
14. #altered
15. #blockchain
16. #without
17. #decentralized
18. #computers