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Bitcoin Q&A: The value of proof-of-work

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This video by the great Andreas M. Antonopoulos try to answer a lot of questions about some technical aspects :

Can a blockchain exist without miners, proof-of-work, or blocks? What are the implications for security, trustlessness, and decentralisation? Not all distributed ledgers are blockchains. What is the influence of alternative energy generation on mining in proof-of-work cryptocurrencies? Should we use alternative algorithms that generate "useful work" in addition to mining cryptocurrencies? The hard promises that Bitcoin provides are valuable and useful in themselves. What is the difference between proof-of-work and proof-of-stake?

You will discover the answers in the video :

 

 

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