1) I am not at all convinced that investing in bitcoins is positive expected value, 2) they seem high-variance and I'm wary about increasing the variance of my money too much, 3) I am not a domain expert in finance and would strongly prefer to learn more about finance in general before making investment decisions of any kind, and 4) your initial comment rubbed me the wrong way because it took as a standing assumption that bitcoins are obviously a sensible investment and didn't take into account the possibility that this isn't a universally shared opinion. (Your initial follow-up comment read to me like "okay, then you're obviously an idiot," and that also rubbed me the wrong way.)

If the bitcoin situation is so clear to you, I would appreciate a Discussion post making the case for bitcoin investment in more detail.

The standard advice is that normal people should never try to beat the market by picking any single investment, but rather put their money in index funds. The best publicly available information is already considered to be reflected in the current prices: if you recommend in buying a particular investment, that implies that you have knowledge that the best traders currently on the market do not have. As a friend commented:

The only rational reasons to hold a highly volatile, speculative investment are either if you have a huge risk preference (and with bitcoin we're talking about crack users) or if it's a really small share of your investments, of which the majority are really low-risk investments.

So if you think that people should be buying Bitcoins, it's up to you to explain why the standard wisdom on investment is wrong in this case.

(For what it's worth, personally I do own Bitcoins, but I view it as a form of geek gambling, not investment. It's fun watching your coins lose 60% in value and go up 40% from that, all within a matter of a few days.)