(1) No way to trade bitcoin or exchange it for goods and services.
(2) All governments of the world placing a ban on bitcoin and bitcoin related activities making it highly illegal.
Bitcoin will definitely fall if this happens, no circulation, no value that will ruin its price.
I doubt this, there are already countries that bans cryptocurrency but they still have access to it. Technology right now is very advanced so very I'm sure that we can still access trading bitcoin.
(3) The entire bitcoin network and nodes going offline making it impossible to even make underground transactions in bitcoin.
This is frightening especially when the internet was reset, all those networks existing gone.
(4) Another crypto overtaking bitcoin and value and more people shifting investment to this new crypto.
I'm wondering what crypto will dominate bitcoin. ETH? as you can see right now, no one can withstand bitcoin's price especially right now, value is growing.