As bitcoin currently is, very few people will use it, not just in the first world. Those from less developed countries will not risk the little money they have in something they don't understand, but fluctuates wildly. Those from even less developed countries won't even have the knowledge of what bitcoin is.
At the same time, as Andreas said, bitcoin price itself is not an indicator of the health of the sector. There are too many other forces like speculators and traders involved. There's lots of price manipulation and such. Bitcoin's infrastructure and such are not weaker than a year ago; they are a lot stronger. Yet the price has declined so much. This is why he advises against "investing" in bitcoin.
However, many people who are not politically motivated, but simply see the many uses this technology brings are very optimistic about this. Fred Wilson says that he doesn't think bitcoin will go away. I think that is the biggest vote of confidence we can get.
I am optimistic. I feel that bitcoin will succeed, and in time it really reaches the masses, and has actual use cases, not just enthusiasts trying to support the economy. It may not be primarily used as a currency, and USD/Euro/yuan/yen definitely won't be going away any time soon. However, if there are enough use cases for bitcoin, and enough people come on board, I think it'll be very hard for manipulators to keep its value down. I hope and believe that bitcoin's price will eventually go up, much higher than it is today, and much higher than most would expect.
If that's the case being optimistic, then why you are against "investing" in bitcoin then ?
Am I mistaken for investing in bitcoin ?