I'm not talking about creating a new alt-coin or anything, nor about becoming another node in the current Bitcoin network, nor about copying anything (e.g. bitcoins) within the current Bitcoin network, but to start a new Bitcoin network, by using Bitcoin's source code, with the exact same properties as the original Bitcoin network started out with.
Obviously this new network will be doomed to fail in that there is essentially no reason for people to join it, but if you can get a couple of friends to join it and become nodes then it's at least possible to create a new Bitcoin network, no? And of course the (eventually 21 million) bitcoins created in that network won't be fungible with the bitcoins in the original network.
I mean, with other types of software you can make identical copies. Can one do the same with Bitcoin?
"Doomed to fail"
"Essentially no reason for people to join"
"Won't be fungible"
Good luck with getting your friends to join with that pitch