Your mother worked very well and through this act she proved that research is must prior to Initiation of anything. Its true that few years ago the price of bitcoin is was low and if she compared that price with recent price then may be regret.
But one better thing about this decision is that if she Put money at that time so she will not be profitable because of unawareness and all you know better that knowledge is key to success. Also she should have utilize little amount because of the higher risk involved in bitcoin investment but not a big deal with patience she can recover payment as well as can get huge amount as a profit.
In the mechanism of wise, investing should be like that, his mother is a careful person in assessing an asset even though the time interval needed is quite long, maybe he also raises money first before investing in Bitcoin, it seems indifferent from the attitude shown, but Little by little he found out, it was better than someone who was interested because of his benefits without knowing the state of the movement of Bitcoin correctly.
Although 2 years ago was a pretty right time because it was close to the formation of a new ATH, but his mother had good wisdom and concern as an investor when acquainted with the new assets offered.
Of course, in Bitcoin must have to be patient to get a profit, if you want to get a quick profit will be quite difficult and can sell at the price of loss because of the market movement if felt every day is boring.
You can educate someone about the crypto space and the benefits that goes with it but, do not pressure someone into bitcoin investments as bitcoin is not in anyway responsible for how people use it. Because of its pseudoanonymity, people use bitcoin for loads of unethical programs that requires people to invest their hard earned money without any form of regulations.
These schemes are not the main intent of bitcoin and the blockchain technology, they only use bitcoin as a way of transacting financially. If things goes south, it further destroys the futuristic idea of involvement in the crypto space.
You are right. I think it's fine to educate people around about Bitcoin, but never pressure them to become adopters, because if they do this under pressure, they are going to blame you later once BTC price falls and enters another recession. Besides taking responsability for you own investments you will also have to be responsible for the investments of people you pressured to invest in Bitcoin. It simply doesn't worth, because after all, you aren't earning anything with this. However, if you were a financial advisor or manager, then it would be another story, since that would be your profession and there would be a contract containing all risks and potential outcomes for the investor to sign, aware about everything.
This kind of thing must indeed be avoided considering that people will ask for responsibility from people who forced him to invest when experiencing a price decline not only in Bitcoin, including all assets made into investment places, educating him to understand it is not a problem, related to any decision In its implementation in using Bitcoin it must be returned to the owner of the capital, because it will make a sad attachment if you do such a thing.
The average of the financial advisors that I met they said Dyor after explaining an investment asset or formula, especially for Bitcoin who had high fluctuations, they always said that.