“As a private company, Coinbase does not allow trading of stock on secondary markets for a variety of reasons, including the fact that there is not full and equal information available to the market,” the company said. “We will take appropriate action if we find people have sold Coinbase shares in violation of our agreements not to do so.” Investors are desperate to purchase shares in the company. But Coinbase already raised $100 million just six months ago — just before the bitcoin craze took off in earnest that fall — meaning that outside investors will have to wait for probably more than a year until the company is ready to raise another round of cash.

https://www.recode.net/2018/1/22/16911692/cryptocurrency-bitcoin-trading-coinbase-revenue-secondary