Cryptocurrency exchange allows users to buy/sell cryptocurrency.
A cryptocurrency exchange or a digital currency exchange (DCE) is a business that allows customers to trade cryptocurrencies,
Businesses that allow customers to trade digital currencies for other assets, such as conventional fiat money, or different digital currencies. They can be market makers that typically take the bid/ask spreads as transaction commissions for their services or simply charge fees as a matching platform.
How does a Cryptocurrency Exchange Start?
For an exchange to function, there needs to be both bids and asks simultaneously. If there is no asks, then no one can buy that specific cryptocurrency therefore there is no volume/trades.