If the person wants investment advice or is looking for ways to make fast money, don't tell them about BTC, because if you do and they get disappointed, they'll blame you for a very long time and that could be the end of the relationship you have with that person. However, if the person is curious about BTC and wants to understand the network, there are a lot of good BTC articles and BTC books on the internet, and you can also introduce them to this forum to learn everything possible about BTC.

You don’t need to convince anybody. If he needs bitcoin, he will learn about it. Maybe it is not the right time for him to learn about bitcoin yet. In the past some people received hundreds of bitcoins as gifts and they have lost the passwords for the wallets of those coins because they didn’t care. Of course now they care because the price is a lot higher than what it used to be but the sad thing is, they can’t access their funds anymore.

Long story short, let your client do whatever he likes to do. Give him enough information to see if he understands what you are telling and if he does, give him some more. If he is not interested, it is not worth your time, leave him be.

For you to want to convince your client to invest in bitcoin, the it means you are already into bitcoin, and you have basic knowledge about bitcoin and cryptocurrency in general, then all you should do is enlighten the person about bitcoin, let them know everything about bitcoin, and it’s left for the client to decide if he or she will be investing in bitcoin. Never force anyone to invest in bitcoin, allow them to decide on their own if they will be investing in bitcoin or not, because if you force them and anything bad happens, you will be the one to be blamed for it. Make sure you tell them bitcoin is not a get rich quick scheme, and tell them they can also lose their bitcoin if it’s not properly stored.

Op, how did you find out about Bitcoin were you convinced by someone or you got the revelation since you said Bitcoin is the smartest virtual currency? I may sound a bit off here but you don't sound like somebody who has a proper knowledge on Bitcoin investment to me so I will advise you don't give someone a sermon that you don't know so that tomorrow they won't come back to cry for you for a refund of money they use for investment because you don't sound like someone who can give them proper guidance on bitcoin investment.

Don't try to convince anyone that bitcoin will give them a double of their investment within a short period of time because bitcoin is not a Ponzi scheme. Any one who wants to invest in Bitcoin should undergo the process of understanding what Bitcoin investment is all about before anything else.

you don't try to convince them, try to explain to them the "basics" and then you point them to information available on the internet or books that could help them understand how the Bitcoin ecosystem works and if they have questions that they have trouble understanding try and explain it to them in a way that they'll understand. the decision of investing in bitcoin should be completely up to them.

Basically, you don't convince people to invest into Bitcoin because that's making it look like another HYIP and MLM for which that's how people are pursuant there because they'd earn from the people they'd invite. Yes, we know that Bitcoin isn't like that but giving that client of yours the materials or guides like Andreas Antonopoulos Bitcoin guide for beginners will be a good start for him. If it's about the technology and how it goes, you should give that person that idea instead of the investing way.

Bitcoin is still volatile and risky(for the noobs, who don't know what they are doing). Why do you have to convince anyone to invest in BTC?
If he/she loses all his/her savings because of bad financial decisions(or because he/she got scammed), your client will put the blame on you. You don't want this to happen, don't you? The best thing to do is just to tell your client the basic stuff about Bitcoin and tell him/her to do his/her own research and find info about Bitcoin. The internet is full with information about Bitcoin/crypto and all the information is available for free.

Can't teach someone else about Bitcoin if you don't have a complete understanding of Bitcoin yourself.
My first question to you when you want to teach Bitcoin to your client is,
What do you mean by Bitcoin? Do you know the correct answer?

If don't know about Bitcoin yourself, you will miseducate others which can lead to losses later on. If the person you refer is interested in investing in Bitcoin, you should first let them know that you will invest as much as you can afford to lose. If a person wants to invest because of the greed of money, he should understand that it is not a get-rich-quick scheme।

You may educate other people about cryptocurrencies if you have technical knowledge about it and you're not only repeating BS like "FIAT IS EVIL, THERE WILL ONLY BE 21M".
But you should never try convincing anyone, they should make their own judgment based on facts.

The first thing I tell to anyone interested in cryptocurrencies is the huge volatility and how easily you can get hacked if you're not very careful.

Only after this disclaimer I continue talking about technical aspects if the person is still interested on how it works and how cryptocurrencies may benefit everyday life.

You cannot persuade someone to invest in bitcoin if he has no knowledge of it. Before you can introduce bitcoin, the most important thing to do is to guide him to learn everything about bitcoin and conduct research so that when he begins investing or trading, he is aware of the challenges that await him because bitcoin is not a short-term investment that will make you rich. If you tell him what he needs to know, you won't be the one to tell him to invest before he does, since if someone understands about bitcoin and has the capital to invest, he won't wait for you before he does, so once you've made him have enough knowledge about it, he can invest because he as no the positive and negative about it.If he invests and sees that bitcoin is declining, he will not complain because he understands that it is volatile and can increase and decrease, therefore any obstacles he faces will not be interpreted as cheating him because if someone does not understand something and you urge him to do it. When he loses, he will grumble and will no longer believe you, and you will be unable to persuade him when you have significant information to provide. Therefore, if you want to persuade someone to invest in something, make sure he understands the market thoroughly before telling him how he will begin to profit.