If they doesn't want to take free lessons then let them to learn by paying a huge fee.

One who want to invest on something need to get thorough knowledge about its function and usability or they will fall for scams which is not common with cryptos almost every kind of investment have scam traps for these kind of lazy shits.

Actually it is not foolishness, but a native trait of the human psychology to become complacent and preserve our energies. Instinctively we just need food,water and shelter. After we have achieved that we need a surplus of motivation and will to get out of our so-called "confort zones" and achieve what we propose. Yet there are few people who actually do that. Ever wondered why the world wealth is so concentrated?

In your case people are more likely to give their money to a stranger than to LEARN and UNDERSTAND the technology. Most of us are looking for ways to increase our income and decrease the resources spent for that, but that's not how it works, right..

It's pretty disheartening to see your friends and colleagues doing what you think to be opposite in life, this will always call for concerns towards them. As rightly said, many of them wouldn't like to listen to the sincere type nor listen to their friends than those scammers out there. Due to human nature, greediness is always a concern to human when money is involve and in this case we are talking about doubling investment money. To OP, if they have ears and eyes let them hear and see with them.

I salute the OP to be very concerned about the views and the way people around them understand what BTC is. The wrong investment view makes it easy for many people to get caught up in fraud with the lure of a few percent profit and a period of time, it's like bullshit, bitcoin is very volatile and its movements are quite difficult to predict.
This is the importance of having an awareness to learn before investing, if you are not familiar with what you are going to invest, then it is a fatal mistake. Let's educate the people closest to us, give a proper understanding of BTC so that it is not easily affected by fraud and can make good use of technological developments in finance.

Where there is currency,  there are scammers lurking around to trap those who are stupid,  greedy and lazy thinking that money just comes out of think Air.
Even one of the oldest form of currency (Gold) has scam around it. So let them  keep having a poor mindset yet you keep progressing.  

Scam is not only happening online there are many people has been victim also using fiat.
The main reasons why there are many scammers because they are also many people supporting scam just to earn money.
They invite people to join even they do not have any knowledge about the program they want to invest its about greed and want to earn easy money.
As long as there are people want to earn easy money there are still new program that will open and find another victim.

Indeed, we will always be easily tricked by investments like that, especially now for HYIP with more and more bitcoin payments and making profits up to hundreds of percent in just 1 day, we really need to pay attention not to be easily fooled because it is not easy to be able to double money up to hundreds of percent in only a short time.

One of my friend name Emranhostat was a victim of fraud. One day an unknown girl sent a message from her Twitter to Emranhostat.

The message goes like:

The girl continued talking to my friend for a few days and able to convince my friend. At one point, my friend agreed to withdraw her bitcoin. The girl gave him a website link as well as she gave email and password too. Emranhostat entered the website and found it to be similar to the other Exchange site, he tried to login with email & password and successfully able to login. He found that there was 0.5 btc in holding.

But, when he tried to withdraw the fund, a popup window comes up and says due to inactivity the withdrawal option is currently frozen. Please make a deposit of 0.002 btc then the withdrawal option will be active again. My friend thought if he makes a deposit of 0.002 btc and able to withdraw the girl's fund then he will get 0.25 btc in return.

He felt greedy, when he did a 0.002 btc deposit after a few minutes the exchange site went server down and the girl blocked him too.
Finally, he lost his 0.002 btc...

That's what I regret, although they don't have to go to cryptocurrency classes or seminars, at least they learn first what will be invested. So it's not easy to just accept an investment offer that promises to be multiplied many times in one week or one month. Come on be smarter, nothing is instant, moreover, cryptocurrency is very dynamic. If they understand the basic characteristics of cryptocurrency, surely people who have never tried it will surely think twice before investing their money, especially in people who are new to them in cyberspace.
This is the importance of educating people around you, cryptocurrency can be beneficial and vice versa, it all depends on how we respond to it.

I understand where you are coming from. We can't please everybody. To think that they are interested at first but they want to gain easily I mean in a fastest way. Reality is that yeah they are lazy to attend seminars but they are eager to    gain. How is that possible? Investing bitcoin needs patience and other don"t understand how it really works as a store value, etc.

People will just get interested if they see some proofs about bitcoin then after, they will gonna invest but the truth is they are not ready for the risks.