Binary options on Bitcoin
BTC/USD is bitcoin in dollars. The chart on the home page is this pair. The market does not close overnight, so a 30-second expiry does not wait for morning. Payout goes up to 90%. Day bitcoin and BTC OTC are different feeds.
Bitcoin appeared in 2009 and became the first cryptocurrency known well outside the industry. New coins cannot exceed 21 million. The network settles transfers around the clock with no issuing bank. The dollar price is the reference for the rest of crypto.