I have a question, if one of the mining pool reaches 51% of the mining rate. What capability can they do from this?
How can you know that there's a risk with someone having 51% of the network control but not know about
51% attack? Read about it by clicking the link. I really wouldn't worry about it that much since it will require a lot of money to do the 51% attack and it will just ruin bitcoin's name. Hence, the price will go down and whatever bitcoin the attacker can accumulate from the attack will not be worth the amount of money that he needed to do the attack. Know that the attack is totally possible, but who will be crazy enough to spend money just to ruin something? The government, perhaps, but it will require tremendous resources which could have been used for other things.
The government using this attack to ruin bitcoin which belongs to the people can be a sign that the government and the people have separated and are in war with each other.
This is a known fact if the price goes up it will surely go down. What happens if the price of Bitcoin falls to $1000 in 2018, will this be considered as a Worst Case Scenario or something else?
Yes that would be the worse scenario to happen for bitcoin and more or less investors that time are already pulling out their investment and then bitcoin will be left as half dead if it will still operate and if it will going to recover again it will not be the same as to what bitcoin nowadays that is so good and has a lot of good things to offer.
That's wrong because a price decrease so major has already happened.
Study the chart. Bitcoin went up to $1200 then went down to $600 really quickly, increased, then went down to $400, increased again, then the price went down to $200. Today, the price of $1200 of bitcoin is already a nightmare for all of us. Was it "never be the same"? Even to the people that have bought in $1200, today is still a good price. With the mentality that you have, I'd say that you're not a true bitcoin believer. Price can go low but know that mass adoption has to happen before the price can be stable, before we can actually say that a major price decrease means that bitcoin is dead and that people have already left it. At this point, even with a major price decrease, we will be able to recover because a lot of people hasn't joined the game yet unlike when mass adoption has already happened and most of our money is already in bitcoins.