I disagree with you, investing is not easy and if it was or if it is almost/everybody would have ventured into it, investing is not easy because one have to think through the advantage and disadvantage of it before one can venture into it and some people in the process of thinking they lose interest because they might think out some scenarios that may be difficult for they scale through because anything about investment, there is always a risk so is not easy and sustaining and investment for a long term is not easy too even though you know the strategy because there are stage one will reach, one will be so confused though sustaining an investment will be or. An be easy if you have the necessary things such as your discretionary, emergency fund and back up fund and most importantly you need to be discipline, determined and know how to manage your investment and sometimes even with all these some people still find out hard to sustain there investment you why? Because they are not disciplined and determined.
So you think the reason why everyone has not invested into Bitcoin is because the investment isn't easy, that's funny because I must tell you that it is not the reason, as a matter of fact there no way everyone will find a particular investment very attractive to invest in, it not possible, I want you to understand that even as Bitcoin has proven to be trusted and achieved a long awaited milestone, there are still individuals who may not find it worthy of there investment because of how skeptical they are towards the said investment, as for merit and demerits of Bitcoin, I must tell you that every investment got this, so it not only Bitcoin, so if as an investor you keep looking at the advantage and disadvantage as you said before thinking of investing in Bitcoin then in all ramification it means you aren't serious about investing in the first place or your aren't much aware of the said investment and how it works.
An investor can only be confused at a point of his investment as you said only when he fail to follow the dos and donts of this investment which is adding more source of income to enable him accumulate gradually or aggressively without stress or the mindset of withdrawing prematurely, for you to sustain your investment you must invest with the amount that you're convenient with, you don't have to follow Mr A to invest the way he chooses to invest when you don't know how sufficient his source of income is, do things to the best of your ability when investing, then you'll see that Bitcoin investment isn't difficult at all, it all depends on how efficient your consistency is.