There can be virtues in Selfishness. Just like there can be negative effects (even if unintended) by being a "selfless" missionary.

For example:

Short-term Focus - Maybe you convince someone to buy BTC, but without long-term support, that person who was easy to persuade, may be just as easily persuaded to gamble on shitcoins. Its possible that person would have been better off if they focused on their career instead of being coaxed into becoming an amateur "investor".

Ethnocentrism - Bitcoiners tend to believe they have it all figured out. This can lead to a certain arrogance or "know-it-all" attitude as they have encounters with curious no-coiners. This attitude can cause resentment or tension to build that actually pushes people away from Bitcoin.

Psychological Impact - Not all are ready to fall down the rabbit hole. Many bitcoiners tend to have radical changes in political/social/cultural views after taking the orange pill. It can lead to estranged or divisive relationships between friends/family. Many people want to stay ignorant of the world's issues so they can focus on work and relationships instead of spending all day discussing geopolitics and macro on internet forums.

Lately, it is my belief that few are able to achieve strong personal responsibility. Those that do tend to be the ones who govern or employ the rest of the population who just want stable incomes and a carefree existence.

Some religions have a strong emphasis on missions, others have emphasis on a personal relationship with the divine. There's no right way IMO, but it can be helpful to identify the virtues and vices with each approach.