My amateur tip to would-be entrepreneurs used to be this: invest in tattoo-removal parlours.
In 2015, nearly half of US millennials owned up to a tattoo, as did 30 per cent of Britons of similar age. Those figures have almost certainly risen since, judging by the number of tattoos brought out into the open during the UK’s recent heatwave.
I do not wear, listen to, or believe in the same things that I swore by when I was in my twenties, so I struggle to believe that when they reach 50, millennials will want to be judged by the Minnie Mouse they had inscribed on their bicep when they were a student. Hence my backing for tattoo removal, a sector that one forecast suggests will be worth a spuriously precise $2.85bn by 2021.