Conversion fees are a problem for the time being[1], but the Bitcoin lightning network solves the issues of gas and payment processing. There are entire countries using crypto currencies now. Cheaper doesn't mean free.
1: assuming you need to convert, which isn't always true. You can use bitcoin as is (case in point, El Salvador).
1: assuming you need to convert, which isn't always true. You can use bitcoin as is (case in point, El Salvador).