So first of all, I think every investor should kill the traders spirit which gets you to follow the chart always and also keeps you waiting for dips to invest.
I agree that if we are in our accumulation phase of our bitcoin investment, we likely need to focus on various ongoing buying ways to get bitcoin, and selling bitcoin in order to accumulate more seems like a gambling approach to bitcoin and filled with too many uncertainties, since if our goal involves accumulating more bitcoin we need to attempt to stay focused on ongoing buying of bitcoin in various ways, and sure at some point it might start to seem that we don't necessarily need to continue to buy bitcoin, even though at some point we will likely will need to calculate the extent to which we need to buy more bitcoin or perhaps transition into either a holding phase or maybe at some point we just buy on dips, since we mostly are getting close to having enough or more than enough bitcoin, and of course, I consider the goal to be entering into sustainable withdrawal and/or having bitcoin as a lifetime investment rather than either selling out of it or overly depleting it, unless a person might be close to death or have some age and/or health considerations that motivates needs to sell larger portions of bitcoin rather than more incrementalist ways of price-based and/or time-based sustainable withdrawals (selling of small amounts based on established parameters).
That's right. During the accumulation stage, selling is a totally bad option, even if the investor's intention is to buy later when the price is much lower in order to maximise profit, this is a trader's mindset and a totally bad idea considering the volatile nature of the market. It's impossible to predict what the market's next move would be and you could end up missing out on more potential gains while waiting for a dip that may likely not come, that's not a reliable strategy at all and anyone doing this could end up in losses, especially when the person is still in his accumulation stage.
It makes a lot more sense to focus on consistent buying/accumulation, especially if the investor's goal is to build a long term and solid Bitcoin stash. As you advance and get closer to your goal, it wouldn't be bad to reassess and if necessary, make a few adjustments to suit your current financial situation. Buying on DIPs can be a great way to add more sats to one's stash, and I think it's also pretty awesome that you're thinking a out sustainable withdrawal strategies.
Having Bitcoin as a lifetime investment is such an amazing idea and you're absolutely right to consider factors like age and health when considering which withdrawal strategies to use. Incremental withdrawals based on established parameters I believe can be quite an effective approach, and it's always a good idea to plan ahead of every situation before taking decisions.