Just thought I would pass along my suggestion on coins featuring the follicly impaired. There are a number of coins that feature Mahatma Gandhi, namely this one from Samoa.

Regarding your reader’s question on bald men on coins, I’d point you to Galba, who was about 70 years old when he was Emperor of Rome in the bloody Year of the Four Emperors (AD 69). He was likely bald and sure looks bald in the sculpture on his Wikipedia page. Many coins depict him with hair, but there are a few that seem to celebrate the dome, such as RIC I, 13.