I agree on the usefulness of technical analysis to limit open and close windows for investments, make models to track your investment performance and other alike activities, but in the crypto realm I have to say that is not as important as you will take it in normal financial markets. Mainly because we have 1500+ coins that essentially performs according to whatever happens to the Bitcoin, and Bitcoin is not a fundamental stable standard to start from. Highly speculative and volatile, that has even more volatile consequences on all the other players in the market, which is mainly pump by not technical people, this is a market that is determined more by behavioral social economics and psychology than anything else.