And the price of bitcoin is always depends in demand and supply..
It can happen but it's not very likely. No transactions means the network will come to a hold, which is devastating for bitcoin.
But there are too many people using bitcoin, so don't be afraid my child.
You are Right, because now bitcoin is achieving the top place, and we can see most of the crptocurrencies are here and some crpto currencies come and down and die, but bitcoin is still alive, so i think it is a proof that bitcoin will be remain in future. Also a huge number of the peoples are using it in investment or trading, So its mean people like it than they are use it, so it has been cleared bitcoin never die.