This is the hard part (for me) when it comes to Bitcoin adoption. Telling Bitcoin and sharing it to ordinary people at least the basics of it. Some of them aren't interest on it. Some might be interested, but they don't have any money to invest into it. Some aren't just that techy enough to use smartphones or any devices where you can have access into Bitcoins. There are some problems obviously that's why only a few percent of the total people worldwide are using it.
Sometimes, you also need to observe your environment. See if they are talking about investments or if you heard something from them that is related to investing. If you don't then most probably, they aren't into it or they aren't interested into it. It's the reason why I'm not sharing anything related to investment here in my place. I only hear gossips from them instead of anything related to investments. Sometimes the best way is to not do it at all.