The nice thing about $600 is that 1.2x isn't even that rich.
It's amusing to note that if Digit goes up 12x - and in unicorn world anything less would surely be considered a failure - Fairfax's stake will be worth its entire market cap

The only thing I would note is that they have not yet
monetised a single investment. They've rearranged them, but so far they've always been paid in shares not cash. The only thing they've received cash for is selling subsidiaries.