I'm not shy about telling people I've invested.  The first couple times BTC has dropped significantly in the past few months, friends/colleagues have suggested I sell, but that's subsided.  They've now seen a couple cycles of volatility and combined with my confidence of recovery, they no longer get up in arms about it.

My parents know as well, but surprisingly, I've heard little from them.  I didn't tell them until they had asked me about BTC at random.  Beyond having said initially 'know when to get out' they've not bothered me during any of these barrages of negative media.  They are extremely skeptical about the US economy, so I think they believe BTC to be as good a financial bet as any.