Why would anyone care if you bought Bitcoin ?
Why would I care to tell anyone that I bought bitcoin!!! There's no need at the first place! Because if I have purchased bitcoin, I believe in the future potential of bitcoin. Why would I want to inculcate the same in others! Time is money and why would I waste my time in telling others!
yes, if I see someone talking shit about bitcoin among my close relatives, I would definitely want to clear up the confusion about bitcoin and the fundamental misunderstanding they may be having on this subject. But it is always best not to tell anyone that you own some bitcoins. That goes against your right to privacy and not sure why would you want to give that up!