Your crypto addresses are safe to display anywhere you would like to accept tips, payments, or donations. It is not possible to steal digital currency with a public address alone. The only way someone could access your funds would be if they had access to your Coinbase account, or in the case of a non-hosted wallet, your private key.
Note: It is not possible to delete crypto addresses from your Coinbase account. Deleting addresses from any wallet is highly discouraged since funds sent to an address which has had its private key deleted will be lost forever.
Public Key (Public address)
Similar to how an email can be given out to anyone to receive messages, your receiving crypto addresses can be given out to receive payments. You can view all of your receiving addresses here.
Much like one needs the password to an email account to be able to access and send a message from that email address, wallets have what is called a private key that is needed to send funds from a digital currency wallet.
Coinbase is a hosted wallet service, which means we manage your private keys for you, securing your funds with a password, device confirmation, and 2-step verification. We take security very seriously at Coinbase and utilize our secure cold-storage technology to protect our customer's funds.