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?
Yes you can fork your own version of the current bitcoin blockchain with even just a single cpu but it won't have the same value unless you can convince other people to use it.
yes thousands of coins are there already created by people. but all are the copies of bitcoin, bitcoin is their master copy, bitcon is unique, not a single coin can compete with bitcoin. people are creating their own coins for different purposes.