Is there a need for one to care to tell that you've bought bitcoin? There's no need to do that, keep yourself private and just avoid being a targeted person by those robbers in real life. Avoid being a target of a wrench attack.
You buy or not, or they buy or not, it's nobody's business. You keep yourself busy with everything that you do and they'll also care for what they do. Keep yourself private when it comes to financial matters and investments.