One particular strategy of trading can't be use all the time.
Buy low and sell high will work all the time. It is an age old method and it always works.
aaand the HODL methodology ..
not much changes, i wouldnt say that nothing changes tho, as time goes by... especially in crypto where there is often unexpected moment created .. as we are in early stage still .. there is breakthrough after breakthrough and any technical strategy most of them cant predict and can not really do much when that situations created.
simply forever HODL and you are in the right path.