You know it's Euros because 1 euro is a meaningful denomination in everyday life. If 100,000 euros was called a Didgeridoo you'd be none the wiser. People will of course start using Sats. What's the alternative? Imagine this future in-podcast advertisement: “Get yours now, only zero point zero zero zero zero zero one bitcoin” “Wait, Mark, how many zeros did you say?” “I think I said four, Linda.” “I counted five.” “Ah, right, my mistake. Get yours now, only zero point zero zero zero zero Bitcoin!” “Yeah that was four.” “Cool.” Like I said, if you're in favour of dropping the brand Bitcoin for Sats in the context of everyday life that's cool but you have to come out and acknowledge that's the rebrand you're pushing for.