That sell wall grew since the last time it was up. ~23k LSK.
indeed, if I'm right when it first appeared it was 4.3M now it is 4.5M
I believe you are right. Which means he is definitely accumulating, and even though he may appear to be a newb whale according to some people, he is achieving his goal.
One also possible senario to me, is that he wants out and is currently trying to increase his lsk before a massive dump , so that he minimizes the losses from his initial ico investment.