Depends on the behavior of the market.
You cannot just rely on one trading strategy because sometimes the plan can be disrupted by sudden economic or financial events. I don't stick to one, it gets boring and for different pairs, there must be a different behavior into which you will apply a different strategy.
Let's say Bitcoin versus altcoins. I prefer a longer timespan when it comes to Bitcoin but with altcoins, I don't do that. Trust issues. Memecoins especially.
There are moments when I want to do it manually if I have the spare time to be monitoring it myself on how one altcoin market behaves.
Just having one will not be appropriate and for me, this could lead to losing more forcing one strategy into a new plan.
Some people even prefer using different strategies for the same pair of tokens that are being traded only to see which strategy works the best since you might want to try different timeframes for a single token/coin trade. And some strategies might not work the same with different tokens or coins as you said, so one will obviously need to try a different strategy if they are trading a different token or coin.
Though I personally tend to stick to what's consistent I also believe making or bringing changes can be a good thing sometimes, you might not get the results you've expected in the same consistent way and a new and changed way might do wonders.
Really hard to think that you would really be sticking with just single strategy on which you would really be facing up tons of market situations on which it would really make you think on having or creating another method
or strategy on which this had been my situation on the time that i had traded up with this market. There's so many variations or situations on which you could be able to encounter on which it would really be just that
right on having the approach that you would really be needing to have another strategy on which you could really make use on a certain situation or condition, because if you do stick into a single strategy
and having this market which is movement is totally random then it would really be hard to make out some analysis whether it is really that something relevant or not.
We do have TA+FA kind of thing on which you could really be able to apply both method as long it would really be that beneficial for you. You cant really just stick into one just because you do believe
that it could handle out everything. Thats not how this market works and would something that too easy to handle out.