This was caused by the Mt. Gox hack, which led to its crash. I didn't know Bitcoin then, but I have read about it a couple of times since I've been in Bitcoin.
This is a prime example of how Bitcoin is. It is very difficult for it to stay down forever. There will always be people who believe in it, and they don't believe in it simply because it's bitcoin, but because of what it offers. I can't tell you of any altcoin today that will crash from $17 to $0.1 and still come back up to beat its ATH, but Bitcoin did more than that in a worst-case scenario.
Well each time there is an exchange hack, Bitcoin market always reacted negatively. During the 2011 crash, it was really devastating, I read there are lots of people who lost funds and there are even rumors from social media, though not verified, that some investors even ended their lives due to fund losses caused by MT. GOX hack.
I don't know it is a biggest crash ever in Bitcoin market history but I don't care about it and with me there is no need of verification this information at all. What I noticed is over time, Bitcoin and its market have grown and become both bigger and stronger, that's enough for its future as well as for a Bitcoin enthusiast and investor like me.
This is just a piece of information. I think it is still a good thing to know and verify this just for the record.
From the video, you can hear whoever it is say, "Were the critics right?"
Things will happen where you would question whether Bitcoin is actually too big to fail. There is a small chance, but I won't be surprised if something happens that makes Bitcoin crash to $20k. At that point, your conviction would be tested, and if you don't fully understand its history, you might be shaken.
Remember Titanic? Many people who boarded it thought that it is an unsinkable ship, but they were proven wrong. I do not think that in this world there is anything that is too big to fail. Everything has its own end, even the mightiest Dynasty crumbles and becomes a ruin.
Bitcoin is highly volatile even with its new investors and institutions coming in, it is still volatile, so seeing the market price crash is not news at all. We have seen it coming, happening and we have seen Bitcoin recovering, surging and eventually recording a new ATH. I think it will still follow that trend for the next cycles, but I also believe that eventually, Bitcoin will break away from its previous pattern. I just don't know when.