Which I think wouldn't happen because if there is one, it is already discovered by now and therefore bitcoin per se is flawed.

I would sell all my bitcoins if bitcoin goes up to $2000 and a major tragedy left me needing the funds

I think such cases will - indeed - increase the value of Bitcoin (together with the value of gold and silver). As soon as a kind of crisis arises, for example when our money is not worth much anymore, such assets (Bitcoin, gold etc) will gain value a lot.

It would be great for the Bitcoin if we are going to experience such crisis, although I don't think I want to experience that. When our money becomes worthless, people will do EVERYTHING in order to survive. Murders will take place for a single bread I guess..

I would sell all my Bitcoins if.. I needed the money for a cure of some health related issue. Then I don't have BTC in an amount that would under any circumstances be useful in that situation.

If the price drops drastically because there is a fight between devs over the direction of Bitcoin.

It would take a long time to reach that price dude. I don't see that price in coming period of time, and if we hold it for say next 10 years to reach that value than we are not sure that bitcoins would exist that long or not as there would be many other new currencies into the market which can easily replace bitcoins, so it is a big question mark on the future of bitcoins.

if price 1 bitcoin 10000$ 

That is the cause of recent drop.

I think that has influenced the value of BTC in a bad way indeed ;\. And, I think it will even more in the future as such struggles keep appearing.

I don't hope we will ever experience a "split up" of the coin: a split up in the sense that 2 new coins arise.