i think If you want to face those situations then you must be prepared. To do that you must do some heavy research on what is bitcoins. You must also understand how bitcoin was produced and how is the price being defined by the market. If you will not read and research then you will be a laughing stock of those people you want to discuss bitcoin with and You can't force people to like and use bitcoins. Many of them still have wrong picture about bitcoins and other cryptocurrencies, thinking this is something that can't be used in real world or it's made for darknet and illegal activities. The best way is to convince them to use it on their own and see all advantages from the first hand....