So, how much do you pay for using DNS protocols? And how much do you pay for attaching the number "10" to your crypto address in Satoshi's system? Do you now understand the true meaning of the phrase: "Your level of your ignorance is astounding."?
Oh, now it's not the matter of existence, is it? You told me that Bitcoin doesn't exist because you can't show it to someone. We told you that communication protocols like DNS also can't be shown to someone but that doesn't mean they don't exist.
Using of DNS protocol is free. But guess what - using of Bitcoin is also free. You have to pay if you want to own Bitcoin, but you don't have to pay to use it.