Do all Cryptocurrencies use Blockchain?

Related questions

1. How Cryptocurrency is changing the world?
2. What came first Blockchain or Bitcoin?
3. What does Blockchain do for Bitcoin?
4. What exactly is Blockchain?
5. What are applications of Blockchain?
6. Does Bitcoin use Blockchain?
7. What is the use of Blockchain?
8. What is the main purpose of Blockchain?
9. What's so special about Blockchain?
10. What is the difference between private and public Blockchain?

Tags

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2. #cryptocurrencies
3. #alternative
4. #created
5. #blockchain
6. #ledger
7. #control
8. #serves
9. #distributed
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11. #financial
12. #bitcoin
13. #other
14. #transaction
15. #technology
16. #decentralized
17. #altcoins
18. #variants
19. #cryptocurrency
20. #public
21. #works
22. #typically
23. #since
24. #database