I suggest you, stay away from the idea of ​​implicating someone in something.
The very fact that you have to ask for advice means that you are not completely sure of what you should present to that client.
Also, if he wants to invest, he must do his own research and become better acquainted with the matter in which he plans to invest. It is a pretty bad idea to invest based on your or anyone else's recommendation in something about which he knows little or nothing.

There are two scenarios, certainly, if everything goes well, everyone will be happy and satisfied. But things can go in the wrong direction and you don't want to be blamed for "bad advice", and that can also happen if the market goes down (as it is right now) and your client has no long-term patience.

Start simple: Bitcoin isnt just a currency; its a new technology that gives people more power by letting them send and receive money between peers on a decentralized network -> No banks, no fees, just complete transparency and money control.

Cryptocurrencies may overwhelm your client. Simplify it. Tell me how Bitcoin's blockchain technology archives transactions across numerous computers so they cant be changed retrospectively without changing all following blocks. The foundation of its security and attraction.

Promote Bitcoin's investment potential. Discuss its background, market resiliency, and expanding business and government acceptability. Equally, inform them of the volatility and risks. Transparency regarding ups and downs builds trust. Finally, reflect their vision. Promote Bitcoin's cutting-edge technology if they respect innovation. Help them understand Bitcoin's cryptography if they value investment security. Instead of just selling, integrate the conversation with their values and aspirations to help them see Bitcoin as part of their financial strategy.

Before giving further directions to clients to invest in bitcoin, you must first understand the science of bitcoin, everything related to investment certainly has risks and you must really explain in detail what bitcoin is, its benefits, long-term goals, etc. clients will definitely rely on your explanations, even the smallest thing will have an impact on their investment. Remember your job is only as a giver of messages, decisions and so on, let the client decide.

In the past, I also did the same thing, only 10 out of 15 people ultimately decided to invest based on their own decisions and control.

You can't just simply think that it works easily. You need to feed them information personally to fasten understanding or else, they will spend months to fully understand how this thing works. You can also link this BTT forum to them for additional information aside from encouraging them to watch online tutorials.

But talking about how to convince them? Well, telling them the truth and the risk will make them doubtful. That is why please don't but just let them decide and approach you if they have interest. Otherwise, you are taking big responsibility for their money. Introducing them is enough but urging them to invest is another story and the worse thing may happen is they will blame you.

Anyone who wants to understand Bitcoin must first understand what money is and understand the current fiat system. If a person is not aware of the problems with the fiat system, they will never understand Bitcoin. Bitcoin was created to solve the problems of fiat currencies. As for altcoins, they are almost the same as fiat currencies, highly centralized and controlled by a small group of people who can print them at will. They don't solve any problems; the only motive behind their creation is to enrich the groups of people who created them

The best thing for beginners is to take the time to read a few books: "The Bitcoin Standard" and "The Fiat Standard" by Saifedean Ammous, and "Broken Money" by Lyn Alden. If a person is intelligent, they will probably understand everything and have a much clearer perspective after reading these books.

From your explanation OP, it seems you yourself don't have much knowledge about Bitcoin, so I would rather advise you develop your skill set about the cryptocurrency environment and Bitcoin in particular, because whatever you should be teaching others is what you yourself have learnt and understood. So don't introduce your client yet, have a practical knowledge of what you want your client to indulge in, is not always Rosie with the cryptocurrency market so it's better you have a first hand experience of the volatility.

If you're client invest with high hopes of possible high return on investment in a short time, then it didn't go as planned, obviously you will see your client frowning at you, because that might not be what you must have told him, so all of these involves what you know and how to go about it before helping others.

I agree.

I assume that people who not understand and want to learn Bitcoin are people who're not a computer engineer/science etc, so it's better to teach them in economic. Most people will understand because they only need to know the basic thing and the reason why they want to invest in Bitcoin aside from the price.

But, it require extra work for people who believe in centralization and government.

Actually in my local Proverbs there is a quote that says that Seeing is believing, however this actually means that you can only be able to show or teach someone if you are already a Bitcoin investor because you will have a proof that would helped and explain to the person that you have a certain amount of Bitcoin in your portfolio, but in a case when you have not actually started investing on Bitcoin there is no way you will be knowledgeable enough to educate someone about investment. However in terms of trying to persuade someone into Bitcoin I really don't see the need to, and if you must advice someone you should be very mindful with the kind of investment advice you give because with a wrong advice if something happens to his investment along the line you could be accused for it.

It might be quite difficult when you convince someone to invest in Bitcoin when he doesn't know anything about it. Maybe the best thing for this is to provide education about what Bitcoin is, how it works, and various other basic knowledge about Bitcoin, so that people can have an idea of ​​what Bitcoin is. And once he understands that, you also need to tell him about the risks of investing in Bitcoin and how best to invest in it as a beginner. Basic things like that should make him more confident about investing in Bitcoin. But just make sure that investing in Bitcoin has risks, so that later when the investment goes negative, you won't be the one to blame.