On the final day in his insurance job last week after 14 years in the sector, Donnie wore a T-shirt emblazoned with a rocket logo, the symbol for bitcoin, and the slogan "to the moon".
The phrase, one that characterizes the fervor espoused by bitcoin enthusiasts who say its price knows no bounds, was fitting.
Over five years, the 39-year-old has made enough money from trading digital currencies to pay off his mortgage, buy a Mercedes, and now swap office life for managing his remaining crypto investments full-time.
Hannah Murphy | CNBC