Gemini, a
cryptocurrency exchange and custodian founded by the Winklevoss brothers, is still in business as of my last knowledge update in October 2024. The company, which allows customers to invest and store digital assets, is regulated by the New York State Department of Financial Services. However, it's important to note that the cryptocurrency market is highly volatile and subject to change, so it's always advisable to check the latest news and updates regarding any crypto-related business.