It's pretty obvious why you shouldn't force someone to invest in bitcoin and I think that it's the same for almost any kind of interaction, it would also make you the bad person in the conversation because you'd get some kind of manipulative vibes and people really don't like it when you dictate what they should be doing since it's totally unhinge and stupid. Also, forcing someone to invest in bitcoin is kind of like using the same polarity of magnets, the more you try to force them then the more likely it is to go away so be careful how you do the convincing because there's a thin line between forcing and introducing. You need to make sure that you're not also that obsessed about them investing, that's creepy.
A question has been recurring in my mind, can anyone be forced to do anything, especially a well-educated, knowledgeable person, who understands everything, can think and understand? We can only tell people to do something, we can never force someone to do something, I believe.
And now there is an era where people don't believe what they hear, believe what is shown to be true, so it is better to buy Bitcoin than to force someone to buy Bitcoin. Buy, profit from it, and show people your profit history if you want someone else to invest in Bitcoin and get profit instead of convincing him with nuts he will never believe until he sees with his own eyes.
I have seen people readily willing to do what they see as their benefit. In today's age, every other person who wants to develop understands the usefulness and importance of Bitcoin, so it has become easier to convince people.