almost all the persons on the forum knows what Investment is on a general bases and those using it on the forum still make use of that knowledge to narrow it down to the idea of Bitcoin investment which which deals with taking some sacrifices at the present with the hope of getting good returns in the future.

Be it the regular investment in persons or assets or any other general thing, the key thing is that you're looking at the potential duties returns that is associated with getting a particular asset class that has the tendency of appreciating with time based on the quantity of the asset you where able to get. Another thing is that even if one doesn't outrightly understand the meaning of investment, as long as you're going about it the right way and can wait till toi get good returns from it in the future, that matters even more than having all investment knowledge with zero investment that is tied to your name.