|Bitcoin miner in La Doré, Quebec via L'Étoile du Lac|
In what form do bitcoin holders bear bitcoin's huge energy costs?
For the Bitcoin network to be secure, it requires miners to do a lot of work, and those miners will only do that work if they are compensated. The creation of new bitcoins every 10 minutes is the main method of paying them. The question in this post is how these mining costs get passed on to people who hold bitcoin. Bitcoin is bloody expensive, after all. Owning it can't be free.
Let's explore the problem by looking for an analogy in traditional finance. In the place of bitcoin, let's introduce CashCo. CashCo owns $100 in cash. It has 100 shares outstanding. For simplicity's sake, let's assume that the shares trade at fundamental value, so each share is worth $1 ($100 / 100 shares) and the company's market capitalization is $100.
Let's introduce Jack, who holds one share of CashCo, worth $1.
Next, let's make CashCo resemble Bitcoin by introducing a mechanism that functions like bitcoin rewards. On January 1, CashCo announces that it will henceforth issue a single new share at the end of every day to an independent entity to validate CashCo's database. CashCo will do this each day for the next 30 days.
Like Bitcoin rewards, the additional CashCo shares are created out of nowhere and are paid to an external validator. Furthermore, the policy is time-limited, in the same way that bitcoin rewards will no longer be paid after some terminal point in time.
This is how it looks. At the end of Day 1, CashCo will issue one new share to the independent entity. At that point CashCo will have 101 shares outstanding. The fundamental value of each share will be $0.99 ($100 cash in the bank / 101 shares). But the fundamental value of the company as a whole would stay the same, since CashCo would still have $100 cash in the bank.
As for Jack, he still holds one share at the end of Day 1, but the fundamental value of his share will have fallen to $0.99.
At the end of Day 2, CashCo will issue another share to the validator, who now owns two shares. CashCo will now have 102 shares outstanding. The shares will have a fundamental value of 98 cents ($100 / 102 shares). But the total fundamental value of the company will still be $100, since it remains backed by $100 in cash.
The fundamental value of Jack's single share will have fallen to $0.98.
Fast forward 30 days, and there will be 130 shares outstanding. Each share will have a fundamental value of 76.9 cents, but the fundamental value of the firm remains at $100.
Jack is a forward-thinking individual. When the new policy is announced on Day 0, he quickly runs through the above calculations and sees that the fundamental value of his single share will be marked down from $1 to 76.9 cents over the next 30 days. Aghast, he immediately tries to sell it. But the policy being common knowledge, everyone else will make this calculation this too. No one will pay Jack more than 76.9 cents for his share, knowing that in 30 days its fundamental value will be 76.9 cents.
And so on Day 0, the moment the announcement is made the value of CashCo shares falls to around 76.9 cents. That is, the new information about future costs of paying the validator gets brought forward in time and is quickly baked into the current price of CashCo shares.
Bitcoin operates along the same principles as CashCo.
The schedule of new bitcoins to be paid to miners is already known. Because bitcoin buyers are like Jack and forward-thinking, this cost is effectively brought forward in time such that it is already built into bitcoin's price. That is, the original bitcoin owners (and all owners after them) prepaid for security the moment that the Bitcoin network was brought into existence.
So let's conclude by getting back to my original question. In what form do bitcoin holders bear bitcoin's huge energy costs?
Holders bear bitcoin's costs the same way that Jack bears CashCo's validation costs: in the form of foregone price appreciation.
Jack's share is worth 76.9 cents, but if CashCo suddenly found a way to avoid paying an external validator, his shares would immediately vault from 76.9 cents to $1. So the form in which Jack absorbs validation costs is through a lower-than-potential price for CashCo.
The same goes for bitcoin. We can think of the price of bitcoin as being much lower than it would otherwise be in a world where those costs didn't exist.
So bitcoin owners, the form in which you absorb bitcoin's huge energy prices is via a permanent discount on the value of your bitcoin stash. Instead of bitcoin being worth, say, $35,000 or $45,000, it's only worth $23,000 – you're effectively missing out on a big one-time jump in the price.
Here's an exercise for you. Does this same logic apply to proof-of-stake coins like ether or tezos? Is the schedule of future Ethereum staking rewards already baked into today's price of ether, just like bitcoin mining rewards are baked into bitcoin's price? Yes? No? Provide your work.