lastly you can always earn Bitcoins once you have a solid knowledge of it .you can even earn Bitcoins indirectly by teaching others or even running a local exchange and lots more. so newbies out there do not rush into buying Bitcoin without first understanding Bitcoin which can even be done by engaging in important discussions on the forum expecially those of experts and experienced investors. remember knowledge is power.
How could we earn bitcoin by teaching others? Whether that will be without investment? Bitcoin is not knowledge itself. Bitcoin is a coin just like other coins, the more its hype is due to the way it is behaving. If we don't know about bitcoin, we can't trade in the manner that should be needed for it, also we have to know about more traders' experience. Trader's experience comes from other top traders, we should know about them in different discussions, and engage in those.
Your words are quite ambiguous in my opinion where when the initial discussion was about investment it would not make sense to relate it to trading because you have to be able to distinguish that investment is not trading and investment is better than trading so you can't say everything in one discussion because there will be no common ground at any time.
It will not make sense if the goal is investment but you look at traders as a reference. you must know your goal from the beginning and when the intention is investment then indeed some discussions about investment strategies are very much here rather than you reflect and make traders as a reference because even if you work hard for the investment you do but when only traders you look at then you will fail or maybe even if you succeed in the end it will not be optimal.