BTCUSD is the market symbol for Bitcoin (BTC) priced in US dollars, where BTC is the first and largest cryptocurrency and USD is the US dollar. The quote shows how many US dollars it takes to buy one bitcoin.
You trade BTCUSD as a crypto CFD, taking a position on the price movement without owning any bitcoin or running a wallet. Go long if you expect the price to rise, or short if you expect it to fall. The pair is quoted in US dollars, trades around the clock, and is highly volatile, so the dollar value of a position can swing sharply within a single session.
Bitcoin's price responds to adoption by institutions and payment networks, regulation and policy shifts, exchange-traded fund flows, and broad risk sentiment. As the original cryptocurrency, BTCUSD often sets the tone for the wider market, and many smaller coins, known as altcoins, tend to move with it rather than against it.
Say BTCUSD is trading at 60,000 and you expect the price to climb, so you go long the equivalent of one bitcoin. The price rises to 63,000, a move of 3,000 in your favour, so your profit is:
3,000 √ó 1 = USD 3,000
Had BTCUSD instead dropped to 57,000, the same 3,000 move against you would have cost USD 3,000.