Enclosing BANKNOTE emoji?

[Leo Broukhis]

There are

�� U+01F4B4 Banknote With Yen Sign
�� U+01F4B5 Banknote With Dollar Sign
�� U+01F4B6 Banknote With Euro Sign
�� U+01F4B7 Banknote With Pound Sign

This is clearly an incomplete set. It makes sense to have a generic
"enclosing banknote" emoji character which, when combined with a
currency sign, would produce the corresponding banknote, to forestall
requests for individual emoji for banknotes with remaining currency
signs.

Leo