Throughout all of the trading history of BTC once there has been a crash it has made a new high and then not traded under the previous crash low. Bullish breakouts have always been followed by bullish extensions. A very impressive trend.
Until 2021.
In 2021 it dump 50%. Made a nominally higher high and then broke the low.
This was a first for BTC. The first time it did not hold the structure of an uptrend.
Failure to hold the structure of the uptrend supports the thesis of a bear market rally.