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$?
Bitcoin has its smallest unit is satoshi or sat.
Ethereum does not have any unit like satoshi or sat.
On each blockchain, there is a native currency that you must have to pay transaction fee for your transaction.
On Bitcoin blockchain, it is Bitcoin or its smallest unit satoshi aka sat.
On Ethereum blockchain, it is Ethereum aka ETH.
You pay fee in BTC or ETH but transaction fee value can be higher and more expensive if BTC and ETH becomes more expensive.