1. Will Bitcoin ever fall to zero someday?
Give a proper argument why bitcoin will fall to zero?
To be honest, I never thinks bitcoin would be zero even though bitcoin didn't have any value when Satoshi introduced it. But even then, we just don't need to be so optimistic about bitcoin that you ignore lot of what it is at risk of. Bitcoin is currency that basically still expects more support from the governments of various countries especially in real use cases. If the government agrees to no longer allow bitcoin to be traded, used as legal tender, then the worst risk is losing value.
I also can't guarantee that bitcoin will last for hundreds of years because no one can predict it for sure, but talking about the possibility that bitcoin could reach zero is completely baseless and even if in the worst case scenario all governments ban it. Talk about zero it means bitcoin is no longer valuable and I think it's almost impossible for that to happen and I also doubt any government within the quotes "globally" would use bitcoin as legal tender because bitcoin would basically never fit into the system they.
I don't see anything worrying about bitcoin and even to think of going to zero, there are many reasons why bitcoin can defend itself from being at zero. So forget about that and let's take a look at the opportunities that are available because trying to make assumptions like this would lead to a lot of speculation that we can't prove to be true.