EUR is the common answer.
or just double all the numbers and use DM
Weirdly the old Deutsch Mark doesn't seem to have its own code point in the block start U+20A0, whereas the Spanish equivalent (Peseta, ₧, not just Pt) does.
TIL
https://www.compart.com/en/unicode/block/U+20A0
Even Bitcoin is there. And "German Penny Sign"?