In the long term, by choosing the best coin, in my opinion it is not a problem if we hold it, but if we want to maximize profits, I think we have to know the moment that happens, so we don't always hold it. sell when there is bullishness and buy back when there is bearishness. especially for short-term trading, of course you have to be able to take advantage of the momentum and not be greedy in taking profits, because there will always be an opportunity to make a transaction
its the selling at bullish and buy at bearish that always become kinda difficult to know we just don't really know when to sell exactly with trading, of course everyone wanna sell at the peak and buy at the very bottom the truth is selling when its high enough the coin could get higher regardless, but thats fine right since we are still in profit anyway. but when it comes to buying at the bottom its the difficult thing, determining the bottom is just so unclear that sometime its like catching falling knives, we can be buying at some point that we think its the bottom but the price could still be dumping further.
therefore its better if we can have clear strategy before hand determine at what point we gonna take profit maybe at 5% or 10% if its short term trading thats already good enough.
if its long term it can be higher than that but the silver lining is that, never get too greedy that we overhold it and instead missed best opportunity ever.