Someone would surely do that if he knows he can afford to lose the amount he is investing, but if someone thinks he cannot afford to lose then he should wait for some time to see if it starts growing or not, if it does he should invest and if it doesnt he should let it then.

I would buy as many Bitcoin as possible so that if the price goes up after that I would make much money.
I know that the chance of that happening is almost zero so I am not getting my hopes up for that.

Most people will probably do that way before it reaches one dollar.

Lol, that is not a good idea. If that ever happens it will be because some sort of alien technology that allowed for massive onchain transactions while being as decentralized as bitcoin's current network. Right now this is science fiction so I would not worry about this.

While the price is dropped down to $1 , peoples will be buy a bulk of bitcoin and makes the price up again .
If that happened on future , it's not the end of world just wait for a month and the price is up somedays.

$100 is okay but I'm not sure Bitcoin would recover if the price dropped all the way down to $1, that would probably scare off the majority of non-crypto people permanently lol. If something like that happened, I doubt we'd see huge demand for Bitcoin again, a different coin would probably emerge as the new king.

You mean you if the price of bitcoin be $ 1? If that happens, we shall be losing money because the price is not good, and to rise if it had been dropped as it was very difficult. But I believe bitcoin might not drop to $ 1 for bitcoin is constantly evolving and users actively using bitcoin.

It will never drop to that price in future, and if it does then before buying we should check the reason behind it and if there is still scope of price rise then we should go for it.

Most of the users will loose faith in bitcoin and will not prefer to invest in, in fact they will quit bitcoin and will switch to some other better product to make investments.

Yeah, it's definitely going to happen to those who are just following the growth of something and only looking for profit without a static view of the bitcoin. But that's not going to happen to those who have thought of a Billionaire, they definitely will do a research the bitcoin and see results in the future. It depends on the person's mindset and I prefer to see a static before the price goes down and after that bitcoin performed action