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I understand what gas and gas price is .. Since gas was designed to decouple the transaction costs from ether since it's changing rapidly, I don't understand one thing.

if eth increases in USD, why does gas price decrease ? I am sure miners don't check any exchange prices at all. So in my opinion it's like when eth in USD increases, users decide to start smaller gas prices, because if they continue paying the same gas prices that were prior to eth/USD increase, then Ethereum wouldn't be worth to them at all. So they start paying less for each gas for transactions and i guess that's what brings down gas price below, is this correct ?

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  • spikes in gas prices are alwas drivven by speculation , lots of people LONG cryptos, but when a downtrend starts they aren't buying, so gas price is low
    – Nulik
    Jul 8 '21 at 12:41
  • Thank you, but what i am curious about is that i listened in the video that if eth price increases, then gas price decreases. which doesn't make sense to me.. youtube.com/watch?v=Yh8cHUB-KoU&t=211s at 3:12 listen to this for 8-12 seconds. Jul 8 '21 at 17:43
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The gas price is a dynamic equilibrium between the number of requested transactions, the number of transactions miners can handle and the cost to handle one transaction.

Since it's dynamic, for a specific requested transaction, you'll have to wait less before it gets handled by miners if you increase your gas price. And you can pay a cheaper fee if you can wait longer before your transaction gets into the blockchain.

Also, increasing the number of requested transactions increases the gas price for a given delay before the transaction gets into the blockchain.

Similarly, if a nonnegligible percentage of miners suddenly have access to cheaper hash power (mostly through cheaper electricity), they can handle cheaper transactions while still being profitable, mechanically reducing the gas fee you need to pay for a given delay.

As such, the gas price is already tied to fiat, since most people pay their energy with fiat. It's just that there is a small (probably not small enough for the taste of some people) time gap between a sudden change in ETH price and a correction of gas fee.

As such, if the ETH price was multiplied by 10 or 100 and stayed that way for months (like it had before), miners would reduce their fees, for they would recognize they're able to keep being profitable even when adjusting (in ETH price) their gas fees accordingly. Hence gas fees are more or less tied to fiat, because it's actually not tied to fiat, but to energy cost itself tied to fiat.

Actually, the most dreadful event is when mass adoption is attempted, in which case the number of requested transactions encounters a sudden spike the current system can't handle without largely increasing the gas fee. That's when you encounter such spikes in the gas fees.

But all these problems will be largely alleviated by scaling solutions, PoS (through way lesser electricity costs), Plasma, and sharding (more directly) being reputably effective solutions.

Taken from Reddit

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  • Thanks, but this really doesn't solve my question. Jul 8 '21 at 16:34

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