TAs must have great value to a lot of Bitcoin traders. There are full-blooded crypto traders who are highly reliant on TAs rather than on fundamentals. They seem to find everything in the charts.
Personally, however, I find it a little funny when my friends talk generously about Bolinger Bands and Fibonacci and RSI and what have you. But then they barely make some profit out of trading. Some are even stressed because of lack of sleep over-analyzing the charts and gained nothing in the end. As for me, I prefer to buy or sell during large swings.
Coming up with a really nice TA on Bitcoin must entail a lot of skills. But there must also be a good reason why HODL became more popular than trade.

John, here, has something to say:
(Photo grabbed from https://steemit.com/trading/@kryptokayden/and-they-said-trading-crypto-is-stressful)