Donald Trump cashed in on more than $2bn from crypto and other business ventures last year. As the US races to become the self‑declared ‘crypto capital of the world’, the president and his family have turned digital tokens, meme coins and merchandise into an unprecedented revenue stream. But just how rich can a sitting US president get? Lucy Hough speaks to the Guardian reporter Aisha Down – watch on YouTube. Help support our independent journalism at theguardian.com/infocus