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Has The Bitcoin Hash Rate Gotten Too High?

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Has The Bitcoin Hash Rate Gotten Too High?

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June 21, 2022
in Uncategorized
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Has The Bitcoin Hash Rate Gotten Too High?

The Bitcoin network’s hash rate level continues to hit record highs in 2022, but how much hash rate is enough… or even too much?

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But how much hash rate is enough? And does Bitcoin have too many miners?

This article takes a slightly unorthodox and potentially unpopular look at hash rate subsidies and offers a surface-level consideration of current hash rate levels from the perspective that Bitcoin’s security would not be meaningfully endangered if hash rate materially declined from its current near-record levels.

To be clear, this idea has nothing to do with energy concerns over mining activity. It only considers the future of mining economic incentives, their effect on network security and a minimum viable hashrate (MVH) level for Bitcoin.

A reasonable reader may ask themselves (or angrily message this author on Twitter), “Who cares if Bitcoin hash rate is ‘too high’?” This is a fair question to which the answers are twofold.

Some hash rate is likely to fall off in a couple years after the next block reward halving. This isn’t a very important development, but as bitcoin-denominated mining subsidies drop (again) by 50%, marginally less-efficient hash rate will inevitably be squeezed out of the market. The chart below shows slight immediate changes in bitcoin hash rate 30 days after each of the prior three halvings:

The mainstream approach (in the small community that is bitcoin mining) to hash rate growth is usually that more is always better than less. Of course, more hash rate means lower revenue for the marginal mining operation. But why not strive for so much hash rate through continued exponential growth of the mining sector that no outside entity would even think about committing a 51% attack on the network?

That amount of hash rate is basically where Bitcoin is today, and a goal to maintain or increase it is not bad. Especially in the first few years of Bitcoin’s existence, “the more the better” was a truth to live by for hash rate growth.

Enter the protocol’s mining subsidy.

Subsidies are any form of economic payment, privilege or other incentive allocated to accelerate or promote a desired outcome. Just like agricultural subsidies incentivize production of corn, wheat and other commodities, mining subsidies incentivize more hash rate. But subsidies are inherently tools for market distortion, and they should never be a permanent feature in any market. All signs point to Nakamoto respecting this economic reality by halving the subsidy every four years, which will eventually result in the subsidized mining revenue dropping effectively to zero.

And the subsidy works! Consider the recent example of China’s mining ban. The mining sector’s shockingly-rapid recovery to the most significant hostile political development in its history demonstrates how strong the economic incentives are to continue mining. Not only did hash rate fully recover six months after the ban, but as mentioned previously in this article, it continues setting new highs.

But every subsidized market eventually faces the question of excess.

Of course, with the hash rate near record highs, the Bitcoin network is more secure than ever. But instead of providing an in-depth analysis of minimum viable hash rate, this article hopefully compels readers to consider that; first, hash rate may not always go up forever; and second, if it doesn’t, Bitcoin’s security will still be more than okay.

This is a guest post by Zack Voell. Opinions expressed are entirely their own and do not necessarily reflect those of BTC Inc or Bitcoin Magazine.

source
News Wire

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