The mistake you made first - telling your friends that you invested in something, it should still be a private matter, especially if you look at it from a security perspective. Owning digital assets in the form of cryptocurrencies is definitely a risk, and even greater if your friends and acquaintances know it.

Another thing, when someone equates Bitcoin with a casino, then that story should stop - such people can't stand that someone disputes their opinion, even if they know they are wrong - because in most cases it all comes down to people out of ignorance talking negatively about something, because they won’t admit that someone is smarter than them.

Religion in the context of cryptocurrencies is another big nonsense - because no one has built a crypto church or prayed to Saint Satoshi every day.

You shouldn't waste your time on people like your friend in the sense of convincing him of something - I would from now on avoided cryptocurrency as a topic of conversation since it is obviously a one-way street for him.