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What global money transmission method doesn’t have transaction fees? Can you name one?

Cash. That's why you have to declare it when you move it around in large amounts.

I would posit that the fee for tje airline ticket or the fuel and upkeep for your car is a transaction fee levied on cash transactions.

Sure, the bill itself is untouched, but the fee is still extracted.

I would posit that you didn't explain why these things are related at all.

Cash has a transaction cost: you need to physically present it.

At scale, you also need to verify it, count it, exchange it, and move it around.