Its an old World of Warcraft meme. I was comparing the bitcoin seller (now dubbed 'the bearwhale') with 25k coins on the ask to a boss that everyone needed to attack.
In World of Warcraft a large team of players (a 'guild') would need to work together to defeat a boss. Such a group was referred to as a 'raid'.
There is a famous video from around 2005 or so where a raid group is fighting a dragon, Onyxia, one of the major challenges at the time.
Several of the phrases that the raid leader says in the video turned into famous memes.
"More DoTs": A DoT or 'damage over time' spell is something that the players would be able to cast on the boss. The raid leader is calling for more DoTs to be cast on the boss, providing sustained damage over time.
"50 dkp minus": When the boss is defeated, the group would have to divvy up its treasure. However, the treasure would be in the form of maybe 4 or so items, whereas at the time a group of 40 people would need to collaborate to take down the boss.
The standard system for handling this was for a leader to track the participation of members of their guild over time, giving out "dragon kill points" or dkp to participants. Thus, a player might participate in ten boss kills over the course of a month, and gain dkp each time, and then once they had enough, they would spend their dkp to win one of the items awarded for killing the boss, usually through an auction system. (Players would bid dkp on the item they wanted, and the highest bidder would be given the item and dkp would be deducted from their total).
The "50 dkp minus" meme comes from the fact that in the video, the leader was threatening the team members with a 50 dkp penalty if they messed up.
Hopefully that made some sense.