What’s Bitcoins Kryptonite?

Let’s be real not every network is 100% safe. — What do you think can disturb or harm the network? What are the biggest threats? In my opinion it’s either:

• A solar storm from the sun that has a EMP effect. It would damage every electronic equipment resulting in the network to go down for several weeks/months.

• Or immense technical advancement in computing power that is distributed unfairly and in the hands of malicious actors. (This could be countered by changing the Bitcoin Core code, to keep the network safe.)

Don’t brand this simply as FUD like most unreflected people in the cryptocurrency space do. What are the biggest threats to the network in your eyes? — Keep in mind, both of my points will not only have a tremendous effect on Bitcoin but on the whole world.