If you have enough assets such as capital, mining tools, miners, etc.(can manage small businesses)
and also you have a small private block-chain system.
until now, you have mined 10% of the P-coins(new Bitcoin, not the Altcoin) with your partners.
and you are preparing to open the Bitcoin exchange(including of P-coin).
In this situation, It is possible to make a new Bitcoin?
If P-coin is released, how many people will be used it? And can it have the same value as other coins?
P-coin

If you use Blockchain from Bitcoin, we will call it Altcoin folk from BTC. I can't understand your mean, but about a coin folk from BTC, you can see Litecoin (LTC)
Yeah, this P-Coin become a question, what's that

Lol
There is no chance to make a new bitcoin, only one bitcoin.
If you want to make a copy of bitcoin, it would be called altcoin obviously.
But, if your intention to get profits, compete with bitcoin try to create a better coin than bitcoin as we know there are some disadvantages of bitcoin that make other coins could survive and keep growing.