You can view the list of supported assets and networks on: https://exchange.coinbase.com/assets
Please make sure you are depositing assets which are supported by Coinbase Exchange.
Coinbase Exchange cannot recover these assets or funds. Should a network be supported in the future, your deposits may automatically be credited to your account.
If you sent unsupported assets to your Coinbase Retail account, you can try to recover them using our asset recovery tool.