I’ve been staring at my portfolio since morning, going through my head is to hold to zero or sell at loss?
Don't worry.
This isn't the first time that I've seen something thinking about this question and putting it up for bitcoin's price going to zero. If you're in doubt now, you better sell at losses. Mental health is much more important than the portfolio that you've got.
If it's going to give you a relief to sell at losses, you think of it before you do. But if you can endure looking at the market then you need to be patient and just look at the whole market from years ago up to now.
Do you think this is the end for Bitcoin or we’ll reach a new ATH after this downsize?
It's not.
The same thought was seen on 2018 and even before that, you can picture out what the people were thinking when bitcoin was not yet on mainstream and it's not yet massively adopted.