I'm sorry, but still I didn't get your new game idea, could please elaborate more.
Are you familiar with stock trading or forex trading?? Basically the stock market and how it works. its the same concept just editing out all the big guy who have a lot of money to make the market move where ever they want.
So your basically turning trading into a casino game with house edge. Does that not in turn, turn you into the 'big guy who have a lot of money" ? Instead of pricing moving on its own accord, you want to arbitrarily set price based on 'rumors' ?
Yea sounds fair
If you put it like that then trading the stock market is a casino in your eyes, and the brokers are the casino with a house edge which is their fees.. Then yes this is a casino
Also to add to your comment (" Instead of pricing moving on its own accord, you want to arbitrarily set price based on 'rumors' ? ") This is pretty much how the stock market works along with fundamentals being news(rumors) or reports such as earnings reports.
Our earnings reports for this game will be our gained funds being pumped into the system to help volatility.