[a-nikolaev]

Many math papers do use weird LaTeX characters [1], for example Halloweenmath [2]. And even though it does not look like there is a shortage of symbols for writing math, emoji can be used too, just be tasteful about it.

  [1] http://tug.ctan.org/info/symbols/comprehensive/symbols-letter.pdf
  [2] http://www.ctan.org/pkg/halloweenmath

[throw0101a]

If anyone writes a (sci-fi) novel and needs a fictional currency, some of those characters could be useful as an unit symbol.

Or go back in history I suppose (𐆖, 𐆗, ₶):

* https://en.wikipedia.org/wiki/Currency_symbol#List_of_histor...

[a-nikolaev]

Yeah, there is a lot of interesting symbols to use.