I work in the stock market and have recently moved into crypto. I can tell you that, even with his techniques, you never look at a single piece of data to create trends.
My biggest problem with every TA is firstly, there is not time frame which is very bad. Second problem is he never uses multiple cryptos to formulate a trend (something we do in the stock market is to actually use a program to analyze thousands of stocks to formulate trends on specific stocks)
The problem with this, as you brought up with the bitcoin crashing thing, is that if some stocks with major influence start to crash then it is likely many other stocks will follow suit. The same appears to be true in crypto, and for this reason his analysis is not only done incorrectly but actually its very dangerous.
Another big point is that in the past year, almost all of crypto as a whole has gone p. Bitcoin was what? just under $2000 USD last January and now its at $11000+? You could have bought into any crypto and effectively made money, you don't need to be a genius with 30+ years of experience.
I seriously hope you do not get flagged to death for this post.
But it's easy to see that all the coins act in confluence, from any analysis and what we see at coingecko and the likes, and it's as easy to explain that haejin sees jaws of wealth rather than fangs of poverty everywhere ;)
I find haejin's prognoses charming and only follow them in part, when they go together well with what other analysts say and what makes sense to me as well.
Doesn't everybody ?
The "to the moon" spirit in the crypto community is very intoxicating, do you believe that by screaming "we'll all flounder in the ocean!" anyone will really be better off ?
As many won't.
Maybe within a year or so, the crypto market will be more integrated and much better analyzed, certainly regulated. Let's all wait till then and better not risk anything.