You don’t have to! You can pay either via PayPal or credit card (Visa, Mastercard, American Express, or Discover). In PayPal’s case, we don’t ever see or store your financial information, and PayPal is a trusted and reputable institution. If you pay with credit card, it’s actually being handled by PayPal as well (though you don’t need a PayPal account), so once again we don’t see or store your personal financial information.
For those who are unfamiliar, learn more about PayPal.