I dont know how high it will go but that is how low it will go. Just a humble call made purely via pattern extrapolation. Since you so strongly believe it will not happen, that is exactly why it's going to happen. I have no further arguments.
You don't have any further arguments? I might have missed your original argument too then!
If you want to make a case for a 70% fall, feel free. There are plenty of reasons you could give, such as Bitfinex being dodgy, or Tether folding, or fees rising too high, or that it is massively overvalued now, or that a better replacement will come along and surpass Bitcoin.
But just saying, it'll fall 70% and that's all I got to say about that is pretty weak.