No, you can visit a cryptocurrency exchange to trade SWT for another token like bitcoin or ether, and then you can send it to your Coinbase account and sell it, having it sent to your connected PayPal or checking acct.
List of exchanges that have SWT available for trade:
- Bittrex, SWT-BTC pair
- Changelly, SWT-any other available token
- ShapeShift, SWT-any other available token
Or you can sell them to a local peer on localbitcoins.com