Do You Tell Others How Much You Have Invested in Your System?

Not important, has no relevance to anything that matters.  

No.  NOYDB.

As with all consumer products and services, the prices audio consumers are willing  to pay for sound quality is determined by their unique perceptions of the inflection point (knee) where the diminishing returns on their monetary investments in audio equipment equals the enjoyment they receive from their investments. And that "knee" of diminishing returns varies by a plethora of independent variables. That said, I don't hesitate to tell anyone that my investment in audio gear now total ~$20,000, And at this point, I have every reason to think that I'll be satisfied with the SQ mis system gives me will satisfy med for the rest of my life (I'm 71 years old). Nevertheless, I'll always remain curious about the other equipment options I might be able to afford if I win the Powerball jackpot. An old tune by the Isley brothers included a lyric that applies to my approach to audiophile, "Love the one you're with." So I love the SQ my system offers me; and I choose to spend my hard earned money on the highest SQ recorded music media available to me--vinyl LPs. That is all . . . for now.

I have never discussed the value of my system with any friends or relatives, although my audio buddies have some idea of what my stuff costs.  It would seem crazy to anyone not in the hobby, but, to me the amount some spend on cars or other things, like a kitchen renovation strikes me as crazy.  It all is a matter of personal priorities.  One of those audio buddies was telling me about a house he is renovating.  When I asked him about the Sub-zero refrigerator he has on order he told me it costs $15,000.  My response: “That is almost as much as a good interconnect.”

Lol I had a guy over that was  bragging about everything he had was bigger and better  when he got to bragging about his cocktail  glass that was time to take everyone for a listen  to Louis Armstrong  Ella Fitzgerald 

 One loo and it was humbling  for that fellow nothing had to be said. Lol.