Right now I can see that Ethereum has fee is very high and it's annoying, I thought after the Ethereum upgrade the gas will be lower? Ethereum is at 1500$ imagine what will happen at 10,000$ per Ethereum.
As long as scalability got increase and it will be able lowering the gas. The scalability upgrade has become the update that in demand by so many people. You can expect the gas price will increase while ethereum will be also increasing the price as well. That's happened in 2021 when ethereum reached its ATH. The fees became so high.
Main Question
Assuming I hold 0.001 ETH mainly for a gas fee only and the value was 0.56$ then price surge up, is the increment going to be on the Sats? E.g ( 0.002 ETH ) or the increment is going to be on the value? E.g 0.001 ETH = 1.06$?
The price will be summed based on the current value. That means if you need to pay 0.001 that is worth $1.06 after it got increase. You have need to paid the same decimal but different fiat value caused by there was a spike in the price of ethereum.