In that case, they better ignore Bitcoin because this investment is just for those who trust and think about the bright future. Investing is too risky which means that only those who can afford to take it and understand how it works will remain while the rest may stay away. In fact, we aren't forced to do that but it is our choice, so it is very understandable that before we invest we are already aware of the possibilities that may happen to our money/investment.
Trust really matters and the more we think positively, the more we gain confidence and succeed.
If they don't understand Bitcoin, it would be better to learn about it first so they can invest well because without understanding it well, they will of course ignore investing in Bitcoin. Everyone can invest in Bitcoin and of course they must understand the risks of losses they will incur and how to avoid this so that they can make a profit from the investments they make.
Carelessness will be a very fatal thing and will always end up with something worse, honestly I agree with you if indeed they do not understand at all about bitcoin along with how it works and the benefits and also the risks then it is better to learn first, it doesn't matter because there is no compulsion whatsoever for them to come faster, it's better late but definitely than rushing but not bringing any preparation, it will only make them fall into the abyss.
Therefore it is better to learn first at least about the basics in bitcoin investment, learn to build good planning and management, emphasize your risk management to minimize losses, prepare a strong mentality for conditions that can make you depressed and at all I do not advise anyone to behave greedily in their investments, bitcoin will not give you quick and big profits, but if you are able to engage well and have good consistency then over time you will get a positive surprise (consistent profit) from bitcoin itself in the future. Actually there are still quite a lot of other things that must be considered but for beginners who just want to jump in I think basic knowledge is enough for them, because they will get more knowledge when they are already involved deep in the investment process.