If your assumptions are not realistic the rest is not either.
What if you take a more realistic assumption and for example say that the whale has double the stack of the house?
What if you consider the bankroll ruined when it's ruined?
How high is the risk for ruin then?
You can't consider it's "ruined when it's ruined". If the bankroll got down to 5 BTC then the max bet would be 1% of that = 0.05 BTC. It never goes to 0, but when it drops low enough the site is out of business. A whale with double the stack as house is almost the same as whale with infinite stack.
What you guys don't quite seem to understand: A 1% max bet is INSANE for the house. You just suffered a 25% drawdown. With a 1% max bet that is going to happen often at these bankroll levels.
Could you walk into any casino in the world and bet 1% of their bankroll on a spin of the roulette wheel? Not even close. And smaller real world casinos have still been cleaned out.
If you want a long term business in JD, you need to lower the max or be fully prepared to get wiped. If you are just looking for a fast buck, well, good luck!