MetaMask requires their users to add a custom token for BTRST before the tokens are visible in your wallet and that you add Base as a custom Network. Here are the instructions to do that.
Add Base by following these instructions to do so.
Then
- Sign into your MetaMask account on your browser.
- Navigate to the Add Token page and click on the Custom Token tab to expand the search window.
- Copy 0xA7d68d155d17cB30e311367c2Ef1E82aB6022b67
- Click Next to proceed
- You will be redirected to confirm adding a token. Click Add Token to confirm