If you believe that you are basically promoting a ponzi / bubble-game if you promote bitcoin.
Bitcoin is insanely underprice right now and has been for a year or so, maybe because of people promoting such "this is actually just a ponzi scheme or bubble of sorts, not a long term project/thing" ideas.
Every single bitcoin that you part with in return for X value from someone else is only ever (in your lifetime anyway) worth less than X if you yourself are defaulting, scamming, giving someone a "token of value" that you do not plan to honour when it comes full circle back to you.
Basically if each individual is a scammer planning not to return value equal to what they accepted for the token when the token having gone around comes around then yes it is a scam and each individual who plans not to honour the token they give out when it comes back is part of the scam.
Many people are basically refusing to part with bitcoins simply because such scammers are offering such little value for them; it is insulting how puny the value they offer...
-MarkM-