Which finger is Gemini?

Could you please clarify what you mean by 'which finger is Gemini'? It seems like you're asking about astrology, rather than cryptocurrency or finance, which are my areas of expertise. In astrology, Gemini is a zodiac sign, not a finger. Each zodiac sign is associated with a specific time period of the year and is believed to have an influence on people born during that time. However, if you're asking about a particular belief or tradition that associates fingers with astrological signs, I'm not familiar with that particular custom. Is there a specific context or tradition you're referring to?