https://coinmarketcap.com/currencies/bitcoin/#markets https://coinmarketcap.com/currencies/bitcoin/#markets Look at the 24 hour volume column to answer your qu

https://coinmarketcap.com/currencies/bitcoin/#markets https://coinmarketcap.com/currencies/bitcoin/#markets Look at the 24 hour volume column to answer your question (yes, it is a robust market with many buyers and sellers). There are a few foreign exchanges with zero fees, so those volumes must be heavily discounted, but the majority of the listed volume is legitimate.