It is if you're the bank who's endorsing its value.

Since "everyone in the world" is who endorses Bitcoin's value - that's who gets to view it.

Encrypt that at your peril

(P.S. Contrary to the faulty propaganda you like to put about, anecdotal knowledge of transaction participants # contractually defined money. You need encryption to protect the latter because it's nominated. You need mixing to protect the former because it's un-nominated but not backed & therefore must remain transparent. If you get that principle the wrong way round then you end up with Monero which is why you're having to cite 3rd-party backed trusted monetary media in your defence).