combining marks for currency characters? general combining character?

[James Kass]

Unicode encodes what is or what will be rather than what might/should/could
be.

The ZWJ character is way to indicate a request for a more joined form of
the two characters surrounding it—at the encoding level.  As such, it's
already in place in the standard.  The ability to reasonably display
arbitrary combinations depends upon computer software, but such
combinations can already be entered, stored, and exchanged as data.

Best regards,

James Kass
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