100%. Cryptocurrencies should always have support and resistance as this makes exchanges being valid and investors having trust to invest, right ? If there is no support and resistance , Cryptocurrencies will be so manipulated that they will become just another bubble with people losing their money more than gaining profits.
The fact that cryptos prices are already volatile it's enough for me in order to trust the support and resistance. If you don't want volatile prices , stock markets are the way where you have only support and resistance but not volatile prices.
%100 does not even apply to systems with great market capitalization such as Forex. In fact, tools like TA stay weaker in the crypto market. Secondly, support and resistance are effective in almost 1% or less of the entire market. BTC is the best answer to many questions. If we see a similarity in today's crypto market, it is about BTC. The result of BTC out of "orbit" would have made TA useless for the entire crypto market. So I do not think support and resistance is as useful as you think in our market.