I think everyone should do a lot of study on this before investing.
It has been emphasis here severally that you don't need to study much about bitcoin investment before getting started besides investing doesn't require deep knowledge before you can accumulating Bitcoin with the little you know about bitcoin investment you can get started if you have your discretionary income ready and then learn more along the process, sometimes trying to know all about bitcoin investment before getting started might lead to procastination of not even getting started before you realize your self you might use up your discretionary income which you would have to get started with for other unnecessary purposes, so getting started when the opportunity is there is very unique.
Is this applicable to everyone? Here we are talking about how poor people can invest in Bitcoin without having to spend their emergency funds so that they do not lose their Bitcoin easily.
A wealthy person can save their earned money in a few steps, while a poor person cannot, so he has to consider many aspects when investing. For example, if a person's monthly savings amount is $100, he can invest $100 in this case, he has to keep an eye on the emergency fund.
I just wanted to point out that he should never invest the entire $100 in Bitcoin because in case he needs some emergency money, he may not be able to collect money from any other source and have to convert Bitcoin into fiat currency, then he may not get the value obtained from Bitcoin.
Therefore, he should invest five, ten, or 15% of that $100 in Bitcoin and keep the rest invested in local currency or gold as an emergency fund so that he can use it when needed.