I would never feel ashamed of talking about Bitcoin, I don't however tend to tell many people about it due to it's complexity and my bad explaining skills

If I were to explain it to someone I would be sure to point out it's current volatility and that is the main reason I have refrained from telling a few of my café / restaurant owning friends about bitcoin; I would hate for the price to drop on them just after starting to accept it. I did convince my father to buy a few in 2013 when the price was hovering around $250-300 and he then sold some off when the price peaked. He's not the most tech savvy person but he keeps an eye on the bitcoin price and I let him know when it's a good time to buy; so far he is the only person I have shown how to use and buy bitcoin.