Matthew 12:43-45 ESV “When the unclean spirit has gone out of a person, it passes through waterless places seeking rest, but finds none. Then it says, ‘I will return to my house from which I came.’ And when it comes, it finds the house empty, swept, and put in order. Then it goes and brings with it seven other spirits more evil than itself, and they enter and dwell there, and the last state of that person is worse than the first. So also will it be with this evil generation.”

Under the authority of Christ and with the power of the Holy Spirit, Christians should speak with compassion, but never compromise on the truth. The best approach varies depending on the person, relationship, and context. If you don't know how to speak, do your best and trust the Holy Spirit to be at work (and study/prepare for next time). During a first conversation, some might respond to a passionate proclamation of human sin and the coming judgment, some to an act of kindness and humility, others to calm discussion about Christ's love, and a rare few respond to debate, evidence and logic supporting the authenticity of God's word. The full gospel has to be understood for them to come to believe, but if circumstance permits, a slow approach over the course of a relationship may be more effective than a single encounter.

Similar sentiment here about Core 30. But also a legitimate question (I'm genuinely open to discussion and change of mind): without significant adoption, what advantage does any BTC fork have over Monero? I think mainchain BTC will continue to serve as a savings vehicle (though price will be propped up artificially through the traditional finance system treating it like a stock), and Monero serves as a secure, private, decentralized medium of exchange. But blake2b? I just don't see it achieving enough adoption to replace BTC, nor does it seem to have any technical advantage as a medium of exchange over Monero.