A Cristiano Ronaldo ‘Gold Grail’ card has cost a collector £11,000, but the complete CR7 collection – which he owns – could be worth “seven figures”.

This card earns double miles on American Airlines purchases and at gas stations and restaurants, and it makes flying less of a hassle with a free checked bag benefit and other perks.

Earn 2 miles per dollar on purchases. Redeem miles (at 1 cent apiece) for credit on your statement against any travel purchase, with none of the restrictions of airline cards.