OP you have taken time to school your friends about bitcoin and the positive side of it and I can only imagine how elaborating you were but I hope you did mention some other key areas of responsibility and risks that is inevitable that as a cryptocurrency holder you're bond to experience such as:
-privacy and security of your keys (your responsibility)
- market volatility which may delay your investment plans like almost forever.
- The needed wallets and exchanges depending on their choice about KYC, etc.
When next you have them around do well to through more light on these key areas and watch out if they still show interest, so it not be to them like bitcoin is one get rich quick kind of schemes out there.
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that should be his next step - share the flaws of this market so they won't expect much and not be blindsided by most expectation that this market is their saviour from poverty.
you can also share some brief pros and cons of BTC. actually, in this forum alone, you will find a lot of dedicated discussions on this topic.
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you need to make sure that your friends also the other side of this market. so they know, you're not at fault if something goes wrong with their journey.