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RE: #9 – Mining Is Out Of Control And The Use Of Resources To Solve Purposeless Math Problems Is Inherently Wasteful And Difficult To Justify
That title tho :D
Proof-of-work is wasteful, however it provides an immense security level to the bitcoin blockchain. The effort one would need to make to launch a 51% attack and the resources one would have to spend are astronomical, and incentivize the attacker to rather participate and reap the rewards instead of blowing billions of dollars on the attempt.
Great article.