Fold has teamed up with Stripe and Visa to launch a bitcoin-only rewards credit card. Cardholders will earn 2 percent back in bitcoin automatically on purchases, with the potential to rise to 3.5 percent through Fold Checking Account activities. Users can also earn up to 10 percent with select retail partners. Analysts note that bitcoin’s volatility means the value …Fold has teamed up with Stripe and Visa to launch a bitcoin-only rewards credit card. Cardholders will earn 2 percent back in bitcoin automatically on purchases, with the potential to rise to 3.5 percent through Fold Checking Account activities. Users can also earn up to 10 percent with select retail partners. Analysts note that bitcoin’s volatility means the value …