People tell me :
The 1st bubble didn't bounce on the global trend line, let me explain :
I mainly based my idea on the % drop of the previous bubbles. In fact, if the % is the same, BTC could hit the current global trend line. The 1st bubble bounced on a previous global trend line, then the trend line evolved due to the second bubble krach. If BTC bounces from the trend line we will know new ATH then correction on a new trend line less angled than the previous ones. It's correlated with the fact that the more money is injected, the potential of growth decreases. So keep in mind trend line are evolving, and the current one, will be invalided in the futur. Hope it's clear :).
I'm not pro at all! Just my humble opinion.