Bull market is time for selling since it is the time where the market is booming and the Bitcoin price is surging. It is advisable to buy when the market is surging except when we had timed it at the beginning of it surging trend. While bear market is the phase for accumulation since the Bitcoin price during this time is getting tanked and dumped. I think these two trends balance each other and there both trend as as special. If I have the holdings, I would love to see Bitcoin to be in an uptrend or bull run while when I do not have, I would love it at a cheaper price so that I can buy BTC at a discount meaning buyer prefers BTC in bear market.
Nobody would prefer buying Bitcoin in the bull market because the price of Bitcoin would be very high, every individual wishes they can buy Bitcoin when the prices is low but not every individual can buy because money isn't always available to them at this times the market is low. Only those that planned for the low markets will succeed in buying Bitcoin. Which is why we have to plan during the bear market to buy by always reserving money by not spending them but saving.
If we missed buying during the bear market then we'll be those buying from those who are selling their Bitcoin for profit and we'll be left to hold through another bear market and hope that the price recovers as it always does when the bull market returns in another four years.
Unless if you do find out yourself on getting FOMO'ed then you would definitely be buying into those peak ones. Come to think that there are really that buyers who had bought on that previous ATH of $69k which even up to now they are really that neither holding up their position or had already cut their losses and sell on the dip (which this is where common things happen). Market is really that composed of bear and bull on which the price could neither be up or down and something that signifies whether you should get in and when you should get out. Speaking about basic principles or cycles
then it would really be just that common in an approach on what are the things that you must do. Buy low,Sell high? Sounds pretty basic and easy to follow but on the time that you are already into this market or stepped your foot then it wont really be that so easy in that case. No doubt that bullish movement or upwards is the main preferred thing because this is what we do all hope or expect about to happen specially if we do able to buy on lower price but we cant really be have a market or cant be called one if it would really be just that a continuous movement on a single direction.