Purchasing Coinbase stock (COIN) on Coinbase is simple. Start by logging into your Coinbase account, then go to the "Buy" section and enter COIN in the search bar. After selecting the stock, specify the amount you want to invest. Follow the on-screen instructions to complete the purchase. If you face any issues, contact +1 855 998 0300, Coinbase’s official helpline number, for prompt assistance. You can also connect with customer service via chat support or email support contact for further guidance. The team is available to help resolve any issues you may encounter.