What is Gemini Cryptos?

Could you please elaborate on the concept of Gemini Cryptos? I'm interested in understanding its role and significance in the cryptocurrency market. Specifically, I'd like to know if Gemini Cryptos is a cryptocurrency exchange platform, a wallet service, or perhaps a different type of financial institution. Additionally, I'm curious about its features, such as the range of cryptocurrencies it supports, the security measures it employs, and the user experience it provides. Furthermore, I'm wondering about its reputation and how it compares to other similar platforms in terms of reliability, trustworthiness, and overall performance. Thank you for your assistance in clarifying this matter.