This is a list of Wikipedia articles about for-profit companies with notable commercial activities related to bitcoin. Common services are cryptocurrency wallet providers, bitcoin exchanges, Gemini, , United States · New York City, bitcoin and ethereum exchange. 4insure.us (4insure.us), , United Kingdom · London. The rise in Bitcoin and other cryptocurrencies has spawned a group of financial tech startups in New York that work to facilitate Bitcoin exchanges. Gemini is a regulated cryptocurrency exchange, wallet, and custodian that makes it simple and secure to buy bitcoin, ether, and other cryptocurrencies.