Is all technical analysis a waste of time then?
Yes
This is very much true, especially considering Bitcoin.
Technical Analysis is based on the assumption that all information regarding a certain asset is available in the market. The price of the asset is the optimal outcome of supply and demand and therefore all the information is reflected in the current and past price and things like volume traded.
In case of Bitcoin there is a huge asymmetry of information. If today everybody in the world who would at any time consider participating in this market knew not only of it's existence, but also profoundly understood the concept and all it's details, Bitcoin would trade for at least $100k right now. That is why it is considered impossible to consistently beat the market, unless you have a very long lucky streak.
Fortunately, information isn't always spread evenly so opportunities to make money do exist, think for example of insider trading, or investing as a venture capitalist in startups. All of us here are extremely lucky to have been presented the opportunity of knowing and understanding Bitcoin before the rest of the world finds out, because Bitcoin is probably going to be the most important startup in the history of capitalism. Investing in Bitcoin truly is the trade of the century.