In fact, that point I mentioned right in the OP, which you included in your quote, by the way. I highlighted that we are not invulnerable or immune to the impact that a big whale could easily deliver. But then the price would plunge however low, even to single digits if, for example, Satoshi himself comes out of his hideout and drops his stash of coins on our heads. But there are more than enough bearwhales beside him who can dump the price below what we could reasonably think of.
The Mt gox coins were never written off but the Satashi coins after this period of time are considered out of circulation permantly. So any return of the OG would be both surprising, no doubt welcomed but very much introduce a giant source of coins back into the market which would not be bullish.
Satoshi is not the only one with a huge stash of coins. I've read somewhere around here that there are a few guys roaming in the wild who have more than 100k bitcoins in the wallets. What if one of them decides to cash out one day? Before the Mt. Gox dude, it was all theory and speculation, but now it is no longer the case. It is a new reality, a reality where one whale crashes the price dozens of percentages in a matter of days. Surely not something to discard or write off in your investment decisions.
I'm going to need a source on who these people are with 100,000 bitcoin under their own control. Somehow they've decided to never use them or employ that capital in a gambling operation or similar just left them unused ?
Without details of who it is I cant exactly decide how probable it is they would sell now and decided not to previously.
I think the very largest wallets regularly used are by business and exchanges. Though the amount appears large, the capital is employed daily in various ways. The value is shared by a great many individuals and all of those people have different thoughts on selling or not.
The big point in a market is not everyone agrees and certainly they dont agree all at the same time. So buyer and sellers find various prices they are willing to part or accumulate Bitcoin at. If we get a trend, its because there is an ongoing theme in the market population. It often takes a long time to get to the conclusion of a trend, its not an overnight event its a process of change.