I dont see a way bitcoin will go to zero. Will everyone decide all the money they put into it is worthless? Like gold, someone will find value in it. And it has lost 90% of its value and surpassed its old high

https://en.m.wikipedia.org/wiki/History_of_bitcoin#Prices_and_value_history

Do you take out the whole internet? You do realize that the internet can withstand a nuclear attack.
https://en.m.wikipedia.org/wiki/ARPANET

And it's tested against hacking daily

Would a secret organization try to subvert it? Possible but people will simply move to another crytocurrency