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Even if there are only a handful of people left in the entire world mining, using and doing transaction on the original blockchain - the one with the 21 million coin limit - that chain is still Bitcoin by definition.
Alright. Call it what you like. If you define bitcoin as
the thing that works exactly like satoshi designed it, then I agree. It doesn't matter what you name it, the OP applies all the same.
Even if the value goes to $2.00 per BTC some of us will still mine it, use it, and support it, just like we did the last time it was $2.00 per BTC.
I wish you good luck. Where will the security come from? If 90% of the hashpower goes to the legal fork, how easy will it be for those miners to perform 51% attacks on the
genuine-bitcoin chain that now only has 10% of the original hashpower?
There is no chance that multiple bitcoin forks or altcoins based on the same mining algorithms can coexist long term. The biggest one will win because it's the only secure network.