IIRC - the 10% IPO means the capitalization at launch will be $160 million. That's a risky investment for people who poured BTC into this. It's easier said than done to hit $1 billion or $10 billion.
You have to factor in the farmers, like miners, who'll be dumping to meet their overhead. I'm pretty certain this IPO was never determined to be a good investment.
If you are quoting $160 million dollar marketcap at launch then its a real good investment, but i highly doubt that number is anywhere near accurate considering it looks like you factored in coins that wont exist for 1-10 years and longer.
lets say 1 billion coins are mined within first few weeks and market cap is 60 million dollars lower than you said. so 100 million dollars. you are still looking at a 240% return of investment. that doesn't include the 40% bonus given out to everyone who bought in. 370% + including the 40% bonus coins.
your maths clearly doesnt add up with what you are saying