Imagine a restaurant chain advertising that their
pizza is the best in the world, and to demonstrate this they explain how much better they are than their competition:

Would you buy pizza from this restaurant? Probably not. In fact you'd think they are idiots.
That's what people sound like when they say Bitcoin is so much better than USD or other sovereign currencies.People use USD to purchase things for cash, or to pay for things, and as a measure of relative value. Nobody "invests" in USD. Nobody buys USD in hopes of having
more money later. It's not an investment, and
nobody looks at it that way. The only explanations for somebody
investing in their sovereign currency is that they are:
1. Lazy: they don't feel like doing anything with their money and they let it sit there.
2. Poor: they don't really have any money to invest, they live hand-to-mouth.
3. Ignorant: they aren't aware there are ways to grow your money with investments.
(And it's usually a combination of these).
Bitcoin, on the other hand, is an
investment. Sophisticated investors invest in Bitcoin in hopes of it going higher in value in the future. (Yes, it's still used occasionally as a transfer means but in that case BTC is converted in/out of quickly).
Bitcoin competes with stocks, bonds, sports betting, Kalshi, gold, land, and a bunch of other things that are
investments in the sense of a purchase being made in the hope that it is later worth more.
When talking about how wonderful Bitcoin is, talk about how much more money you made or would have made had you invested in BTC
versus other investments, not something that obviously is not an investment and doesn't try to be.
Bitcoin does not compete with USD, EU, or any sovereign currencies. To say it does is like saying your pizza competes with a plastic disk made for throwing around the backyard.