Generally OTC desks are useful for large purchases. Let's say you want to acquire $100 million in Bitcoin - you could go to Coinbase and just do it, but you'd drastically move the market, have a really obvious candlestick, and an observant third party could look for large movements from Coinbase and potentially track your holdings / de-anonymize you.
An OTC desk can be setup to spread the buy over several days / months, buy across markets, and optimize for best price execution. It's not necessarily a huge business, but a lot of businesses and high net worth individuals will use these types of services instead of trying to learn the skills themselves.
An OTC desk can be setup to spread the buy over several days / months, buy across markets, and optimize for best price execution. It's not necessarily a huge business, but a lot of businesses and high net worth individuals will use these types of services instead of trying to learn the skills themselves.