Okay I need to jump in here being that your reference Haejin is a poor example of technical analysis.
In fact, I have noticed and preached how cryptos chart so much cleaner than stocks. Crypto is like trading internet stocks in 1999. Basic support and resistance lines and reversal patterns are working a high percentage of times.
Using basic charting principles I have made and more importantly saved a nice chunk of money by buying at support and selling at resistance.
Please know that I was a full time equity trader for many years and trying to actively trade stocks these days in nearly impossible - cryptos on the other had have been rather friendly.