That wall is likely an experienced investor taking advantage of relatively low volume to induce selling into waiting bids.
Some may argue that it’s an inexperienced newbie, however in this case, I lean toward the side of it being an experienced investor taking advantage of low volume.
If volume and number of trades increases, the experienced investor will break up the order and or remove it completely.
That’s just my take based on the accumulation and action over the last few weeks.