OP, you have done well. I also want to ask you a question: since you have explained the inflation part to your friend in question, did you also explain the risk involved part and how to protect and maintain his funds? Buying funds is one thing; protecting those funds is another. I will advise you to also educate your friend regarding fund protection.

How to protect his private key, which wallet is best, how to avoid some untrusted sites and links from unknown sources. If he is using a centralized platform, it should be temporary until he familiarizes himself with the blockchain and makes his own choice of security.

He is 100% in charge of his own security; you should educate him on that so as not to hold you liable if he loses his funds in any way. I just think it's very important to point this out to anyone we are inviting into the crypto community.

I told him a lot about safety, imparted knowledge in various ways. Since the investment will last for a long time. I recommend the Electrum Wallet wallet. He is using Electrum wallet.

Another topic dedicated to the story of investing mother-father-brother?

I believe, believe, and this is the truth. Ok. Your story would be more complete with the provision of supporting information (of course, one that can be shared online). It's your friend and I don't think there could be a problem with that, right. I'm sure you can explain to him the desire to share this with the bitcoin-community.

If you told your friend about bitcoin, it would be wrong to keep silent about the bitcointalk forum. Help him create an account here and let him delve into the basics of BTC. It will be useful for him, because he's are interested in btc, as you say.

500$ for the first investment in bitcoin. Isn't it too risky? And if a newbie friend makes a mistake with the address or something else, it will be a shame. Why not try with a small amount first to practice?

By the way, when did your friend buy btc? Were there high transaction fees back then?

You shouldn't listen to Internet strangers for financial advice (except from staying away from them, lol), so there isn't much to be said here.

Time will tell if your friend made the right choice, which happens to be almost everyone's choice in this forum. If I were you, I'd have clarified he shouldn't be expecting profit in the short term, and that he is entirely responsible for his wallet's integrity; there is no company to address for that matter. So I'd guide him at start, on what wallet software to choose, how to securely airgap a device etc. I'd also advice him to stay away from centralized exchanges; at least not leave funds there.

Telling your friend about Bitcoin, is a way to help increase the Bitcoin community, Weldone mate. But I don't think your friend should have invested on Bitcoin just yet. He barley understands the risk involved. As his friend, you should have advised him to exercise little patience and start investing when he has taken his own time to learn about trading.

Jumping into investment could put his money at risk and later on he could run back balming you for this. 500$ is a big amount, hope he is not thinking that Bitcoin is a get rich quick program? Because if yes then that would be a fault from his end.

Also, I think you should Invite your friend to this forum BITCOINTALK so he would at least be able to ask questions if need be. And from time to time check on him. So he wouldn't loos his funds to scammers through various means.

From the discussion pattern and the way OP's friend have decided to invest in bitcoin, it looks like OP's friend have heard about bitcoin earlier through someone else or through some source. When OP too spoke about it, the friend might've built confidence on investing into bitcoin. Nothing seems to be the fault of OP, it is our responsibility to spread the word. OP have done it and he hadn't compelled his friend to invest into bitcoin or other cryptocurrencies.

That is a good thing, you will not be mistaken if he makes a mistake in his investment after you explain the risk and suggest how to invest in bitcoin safely.
Your friend may have learned bitcoin outside what you have given that makes it confident with the opportunity.

I have also done what you did, but what I have explained to my friend he did not remember what was concerned in the investment of Bitcoin, one day he had panicked in his investment and forcibly selling Bitcoin in last year and suffered sufficient losses Quite large, and strangely he blamed me and acting Victim playing, he made me who plunged him to the loss he experienced, it made me disappointed and lazy when my friend asked and asked for guidance.

You were honest with your friend and that is what matters, you told him a little bit about the history of bitcoin and you were open about the possibly of earning and losing money as well, if your friend then decided to invest on their own and they lose some money that is on them and in my opinion you hold no moral responsibility if that were to happen, but at the same time your friend could still blame you so you need to be careful about this scenario as you could potentially lose a friend.

Well I wouldn't have to condem your story but I will say that your stories don't look rely impressive  to me though you're not here to impress  or please anyone but I'm just saying that your story don'took very real to me and please pardon me if that got so hard on you 😌 I just had to say it.
I also want to know how much knowledge  you have of bitcoin  and you shouldn't  have allowed your friend rush into investing simply because he has some money to invest at the moment  and if there was any need for investment now, then it should be investing in the knowledge  of bitcoin  rather than buying the bitcoin  now.

Whatever they are might be, since nothing is certain in bitcoin  and  many people already believe  that we should be expecting  a bull run most especially  after this attack on mempool so we hope his investment yields profit for him and not lead to regrets.

I think you should minimize  your effort of spreading  the news of what you're still trying to figure out so as not to get into any troubles if things suddenly goes sour.