Exactly.. Selling and expecting to buy back cheaper (to increase your BTC stash) contains a lot of uncertainties, and seems so easy in theory, but not as easy in practice.... so then one of the main logical solutions is not to sell any of your BTC unless you are expecting to not be able to buy it back.. so then that means that you either have enough or you have excess... it is difficult for a bitcoin newbie to get to a position of having enough or excess bitcoin, but if a bitcoin newbie reaches a status of having enough or too much BTC, then he has more options regarding how to treat his BTC holdings.
so that also means that if the goal of selling your BTC is to be able to get more BTC, then that makes less sense than just continuing to buy BTC.. so that if you conclude that you don't have enough, you just keep buying until you have enough or too much.
I understand what I am saying does not make sense to some people, especially those who really believe that there is some value to try to sell BTC in order to buy back more, and so they are free to employ such strategy, which has questionable odds of success.. especially if it ends up getting the guy out of the buying and accumulating mindset.. which truly is the most assured way to actually build a bitcoin stash to high amounts.
The uncertainty in this step is of course if they don't have the patience to wait, but if they are patient maybe they can buy it back at a cheap price. But selling to be able to add BTC by accumulating at a low price is often not in accordance with our expectations. Meaning that after they sell, the price actually goes up and at the same time they cannot control it so they buy back at the highest price, which will harm them in paying trading costs. And also their targets were really not achieved.
For this reason, I am more interested in continuing to hold and accumulate bitcoin at low prices with reserve funds, therefore reserve funds are really needed to take advantage of the opportunity to buy on the decline. Selling is certainly not a good principle for someone if they are planning an investment in the long term but they change their mind by selling and buying again which can turn things into quite a mess.