Obviously single ownership of a coin wouldn't be feasible.
Lets say I start a poker site. What percentage of a coin do you think I would need to own? The reason I would want a large percentage is because I want the coin bootstrapped to my site so the more popular it gets the more value is add to the coin.
I guess it would be similar to how the bitcoin was bootstrapped to silkroad in the early years.
So in theroy lets say I have 30% of a coin and start my poker room it takes off and I have thousands of players. The coin was valued at $1 when I started now its at $2. Now what if when I started I only list the coin on one exchange, mine. That should increase the value immensely when my poker room takes off right? Other exchanges are going to buy large amounts thus creating the demand?
It all depends on how successful your coin becomes. If the site is famous, only then the value of the coin might go up . But since it would probably not have any other use except for being usable only on that site , therefore it could go down as well. In the start unless you have all the mining and other things, the value will likely go down. Also it will not be straight away added to an exchange just because it is just another altcoin.
In the start you could premine and take control of a certain amount of coins, and have it distributed someway to get people to play on site. Having people buy it to play on the site isn't an appealing option, unless there is also a way to convert those coins back to bitcoin if the coin is not listed on an exchange.