I have heard of Sukuk bond before which is commonly done by Muslims. I think it is about something related to debt in a way that some people or organizations profit from it. Which means that is not also halal? Why are Muslims doing it publicly?
Because in sukuk, they make money from tangible assets, not by money with money (interest).
Let's say the sukuk issuers have heavy equipment, the investors want to be a part of it, so they invest their money to the issuers to get a share. Whatever the results, the investors will accept to get reward/loss based on the agreement.
Also if borrowing with interest is haram, no need for Muslims to borrow such money. So if I buy something at $50 to resell it as a trader for $55. That should also become haram because I should not include interest.
Technically yes, even some Muslims think Bitcoin is haram because it has no physical appearance.
It's complicated, but I just want to share based on my observation.