I think if a particular strategy is not working again them I believe you should change it, maybe due to current market situation that's why your strategy is no more functional then do more research and try to change your strategy. I cryptocurrency I don't even believe one strategy will work for you foreve since the market changes then you strategy should also change if the formal one is not yielding you more interest again.
we should not change our strategy too soon,better to evaluate it and find in which part this strategy was not work for us. sometimes our mental and psychology that uncontrolled could be this reason, even our trading system was the best but as long as mental still uncontrolled it will destroyed.
Why not change your strategy if it doesn't work for you for quite times? maybe you need to re evaluate what happen and what mistake did you do then change your strategy so that you can get better trades on next time around and also strategy will never work if you don't have discipline also don't have any set exit plan so better learn that two before concluding things since for sure you will end up earning good numbers once you do a good trades.