I propose an alternative. Definitely don't do Sell Buy Sell, but you can do Buy Sell Buy.
I wonder how many users will understand what this means.

you are probably right, but you can only sell what you have and you can't have it you don't buy, so with bitcoin I don't think selling can ever come before buying, so you have to buy buy buy before you can sell sell sell
You've read it a bit too literally. You could say the same thing for the topic title? How can you Sell Sell Sell before you Buy? I will give one interpretation that could be, you can come up with some more. Never sell as much as you are buying, this means that you should never exit back fully into the scammy system of fiat.

What you are suggesting has a trading sound to it, yet I suppose timeline might make a difference in terms of figuring out how to interpret your puzzle.
My own idea is buy and continue to buy until reaching overaccumulation status then you are able to sell, within your overaccumulated amount, yet you would not be selling with intentions to buy back cheaper, yet if the price dropped cheaper, you would have the option to use some of the funds generated from the sale to buy back.
It is also a test to see who is really thinking before writing something. My alternative has many interpretations, and your plan would be one of them. Buy, Sell, Buy.. buy enough to reach overaccumulation status and you can sell sometimes but you should buy some back again or buy some more.
As already mentioned, you cannot sell unless you bought first, and personally I recommend that newbies build up their bitcoin stash through ongoing buying, so they would not be selling perhaps in the first several years in being in bitcoin unless it is just sell and replace... so in their beginning years in bitcoin - perhaps a whole cycle or longer, they would ONLY be buying and building the bitcoin stash and hopefully ongoingly studying bitcoin and their personal finances so that they can figure out what they are going to do next after they built enough bitcoin or even in the process of trying to figure out how many bitcoin is enough or more than enough.. which they might not even be able to reach in the first cycle or two, unless they are able to employ a somewhat aggressive bitcoin accumulation strategy (that only involves buying).
If you add the factors of time and frequency into the debate it becomes more complicated. Obviously neither the post from the author of this thread nor mine implies single event of buying or selling.
However, regarding the two points you mentioned, I briefly see two distinct sides, such as those who frequently sell after buying and those who frequently buy without selling. Therefore, each of us must know where to position ourselves if our goal is long-term investment in Bitcoin while properly implementing the methods we've prepared and mastered.
You are onto something.

It can also specifically refer to people who are quick to sell in panic. This is not the recommended course of action. I wonder what people think here about panic buying though?

I am not talking about something dumb as taking huge loans to buy or buying beyond your means, but rather from the time perspective. You finally learned about Bitcoin and now you are rushing to buy some.
prices are lower. Starting a dca say 100 usd a week for a year would be an okay move. Doing 100 usd a week for 2 years would be better. As long as you Just stack them and hold them.
I'll do you one better, 100 usd a week for the rest of your life.
