Gamers beware: The risks of Real Money Trading (RMT) explained
The phrase appears to be a highly specific reference to the niche community of Real Money Trading (RMT) in video games, likely centered around a Vietnamese group or individual and a specific in-game challenge or entity known as "Perfect Monster."
Real Money Trading. RMT generally falls into two distinct camps: Power-levelling, and in-game item or currency purchases. Malwarebytes Vietnamese Slang Words: A Real Guide to Sound Like a Local
: "Perfect" entities are often one-of-a-kind or require thousands of hours of "cày" (grinding).