The most infamous financial scandal in US presidential history – the 1920s Teapot Dome affair – involved President Warren G Harding’s interior secretary Albert Fall taking roughly $400,000 in bribes. Adjusted for inflation, that’s about $6m today. Last year, Donald Trump made at least $2.2bn; his single year of income is on the order of 200 to 300 times larger than the bribe that defined “presidential corruption” in the American imagination for a century.

It’s taken for granted that Trump flogs items like Trump Bibles and gold sneakers as a way to wring more money from his loyal base. But of the president’s $2.2bn, at least $1.4bn came from his crypto businesses. That’s an extraordinary achievement, even for an…