This is a bad idea, because the browser isn't guaranteed to copy the invisible TC.
Are you sure? The characters are "visible", but the font defines them to have zero width.
Yes, I'm sure. I copied this:
100
BTCAnd got:
100 B
This is only an issue when the only thing copied is the price tag, as the TC is copied properly if the selection encompasses what's after it too.
Just tried it again to be sure, taking care to only copy the tag and not any whitespaces before or after.
Pasted into an ANSI document.
Autoresolves to BTC without a hitch.
I guess it is a problem on my end then. Different computers/environments have different methods of handling these zero-width characters.