Pals, family and motorsport stars have managed to raise more than £650,000 for the 17-year-old, from Charlwood, Surrey.
Red Bull Racing firebrand Max Verstappen has now donated a further £15,000 to the campaign on JustGiving.
Meanwhile, the teen – who has now woken from a coma – is already determined to get behind the wheel again, learning how to use a clutch on a steering wheel with his hands.
“He’s exceptionally positive about the situation – he’s sat there working out how to use a clutch on the steering wheel with his hands.”
Verstappen, the youngest race winner F1 history, forked over the cash as people from across the racing world helped out.
The Dutchman also shared the JustGiving page to his near 500,000 followers on Twitter.
The 19-year-old said: “Really shocked about Billy Monger’s terrible accident. If you can, please join me in helping him out.”
1991: posing for a photocall in Hamburg