The Adobe ColdFusion variable naming rules, listed at the URL below, specifically allow for the use of Unicode currency symbols.
The following is valid syntax - works in both ACF and Lucee:
The following is valid syntax - works in ACF but currently errors in Lucee:
There is an official list of Unicode currency symbols, maintained by https://unicode.org, all of the symbols shown there should be supported in variable names (as per they are allowed in Adobe ColdFusion). Unicode Currency Symbols PDF attached, URL included below.