I don't see why they case so much about 31 million dollars in Bitcoin, though, since they're millionaires anyway
Not even the wealthiest legacy elite will let an opportunity pass to potential gain dozens of millions in an asset.
In the end, assuming that the WV twins still hold their 100,000BTC, which I doubt because I'm strongly of believe that they did liquidate a chunk of it during the peak, but in case they haven't sold anything, their current stack is worth around $400 million. Current value of 5000BTC is $20 million, which means 5% of their current stack.
I'm certain that their Gemini exchange hasn't even made $5 million in profit last year. Do the math.