Okay, so I'm just gonna skip the argumentation phase and get right to the point: You're half right.
Bitcoin in its current state, has a limited supply: 21 million. However, changes can be made... If the whole network agrees to it, we could up that limit. Now I seriously doubt that will ever happen, but it's possible.

But that wasn't what you were trying to say. You're saying that if someone forks a coin, it would effectively up the coin's supply limit. This is not true.
If you fork a coin, you increase the supply limit of ALL cryptocurrencies together. Not that of Bitcoin. The supply limit of Bitcoin stays the same: 21 million.

Though I must say that I sort of agree with you that the argument of "Bitcoin has a limited supply" isn't a great argument for its price to rocket. It's partly a reason. If Bitcoin's supply could grow 10x in 1 month, obviously no one would invest in it. Luckily, that's not the case and Bitcoin's inflation is quite low.
However, it's quite likely that Bitcoin won't keep growing. Why? Because there are a whole shit ton of other cryptocurrencies out there, each competing to become the largest. And is Bitcoin, the oldest crypto of all, also the best crypto? Probably not. There are many cryptocurrencies offering way faster & more anonymous transfers, lower fees and other awesome features.

Bitcoin's dominance isn't an infinitely strong force. It's going to collapse and other, more advanced, cryptocurrencies will take its place. It's not a case of "if", it's a case of "when".

In short: Bitcoin has a limited supply. It's not a great reason to invest in it though, as there will be many, far more advanced, cryptocurrencies, competing for dominance over the relatively new world of cryptocurrencies.

Regards,
Trump

Sorry that you do not have the wit to understand the argumentation and are confusing the topics. The underlying reality is that the cryptos are fungible, and to boot demand will no longer be there

No, you are wrong, Bitcoin is BTC, if another alt coin comes, like BCH, BTC Gold or any other currency, it is not the same coin! When you do a fork, a new ALT Coin comes, this is not the same coin as original one.
Cripto currency are infinite, you can create your coin now if you want, but the supply of orignal Bitcoin Core is 21 million, this was in code created by satoshi nakamoto.

This is a good news, initially I just thought the bitcoin supply was limited, and it would peak at some point. At that time the bitcoin source will be exhausted and we lose white!

yes it's an advantage for someone who joins bitcoin with no limited supply anyone can join bitcoin ..
with that we can search for more additions by joining in bitcoin

Actually, there is no effect of Forking on bitcoin. So, the supply of bitcoin is limited and here your argument is not right at all.

If I think total bitcoin supplay will not increase despite existence of hardfork. Hardfork just as ico that we know, the creation of the coin this result of the discussion and approval of minner around the world.
so it will not affect the suppply bitcoin.

Bitcoin have a limited and finite supply. In fact, there are only 21 million Bitcoins that can be mined in total. Once miners have unlocked this many Bitcoins, the planet's supply will essentially be tapped out, unless Bitcoin's protocol is changed to allow for a larger supply.

You are wrong. Bitcoin does have a limited supply. As you said, every person here can create their own hardfork of Bitcoin so why didn't you create your own Bitcoin in order to exchange in to the real one? That's quite simple. Someone is willing to pay for hardforked coins because such person thinks they might be worth more in the future. No support from community = your hardfork is worthless.

It seems that you are the parrot here...
You can say that cryptocurrencies are unlimited in their supply but "BITCOIN" itself is limited. Your title says "Bitcoin does not have limited supply" and that's totally utterly wrong. End of story.