“Wen”- A slang misspelling of the word when.  This usually is part of a short question with badly appointed grammar. In crypto gaming chatrooms people can be seen asking repeatedly asking “Wen Moon?”  and they are actually saying “When will I be rich?”

The misspelling of when, to “wen” is intentional, but its origin stems from chat participants that were struggling to learn conversational English.  Now it has morphed into a slang term used by seasoned players who know better. Most of the time word wen is part of a very short question containing only two words.  

The disgruntled gambler asked loudly to nobody in particular, “Wen rich?”