The US, GB, Australia way of writing numbers is 0,0.0
Yes, and they are only a portion of the world.
https://en.wikipedia.org/wiki/File:DecimalSeparator.svg
I could argue that it would be confusing for these people also if I choose to swap '. 'or ',' or started to do my own thing.
From the point of view of a german, do did swap "," and "."
Now I have looked into all the BX for the popular coins and they all follow the 0,0.0 way of formatting numbers.
You might be suprised to hear that, but some sites imply shows the numbers in a way typical to your region. For example, coinmarketcap.com shows it as $999,99 for me, but $999.99 for you. So simply saying "they all use my system" is true and wrong at the same time.
It is not the end of the world, only a minor point, but it can confuse people.
I am aware websites could implement some modifications depending on the region of the users. I did take that into account when I said I checked the BX of popular coins and said all used 0,0.0
I think you misunderstood my point which was what's confusing for you may be clear for another, and what's clear for you may be confusing for another so the only winning solution would be 1) no formatting 2) only using "." to separate the decimal part (maybe less confusing?) 3) getting the visitor regional preferences which I won't do.
Now, I do believe that the "American way" is the most common form in the anglosphere and that is confirmed by your wikipedia link (the BX is in english). I believe it
is common enough for everyone to recognise and that's why I chose it. I apologise if it confuses anyone.