Technical Analysis as we know it developed in a Fiat system.
Therefore - and by definition - it breaks under a sound-money, deflationary money transition.
The basic concepts, ideas and measurements still hold, but they have to be recalculated from the ground up to provide meaningful action.
For instance, the Bitcoin bull-market of Jan 2024 to Dec 2025 was a classic bull market.
But the Bear Market Bitcoin entered in May of 2025 has still yet to be recognized as a classic Bear Market - in a sound-money system.
tl;dr - Bear Markets now go sideways w/ reduced volatility until conditions usher in a new Bull run.

