"Investors" and "manipulators" are going to find out one day that Bitcoin is a 24/7 open ledger that won't allow cheating.
Did anyone say that 'investors' or 'manipulators' are 'cheating'? If they did, I would disagree, and go so far as to say that they (or we) are probably the only reason the system is even where it is today.
For every pump, there will be an instant dump and vice-versa. There will be very sophisticated analytics of the block-chain so it will be difficult to pull HST algorithm tricks like you can with the closed systems on Wall Street. Bitcoin will become a full-fledged currency worthy of spending and saving. Apps will be developed, which will cause speculative bubbles. The bubbles we will see in the future will be as unpredictable as any, but Bitcoin will be spent because they are damn useful. When people become accustomed to using Bitcoin, more apps will be developed. Rinse. Repeat.
I don't want to be to sacrilegious, and I am a huge fan of Bitcoin in it's current original form, but it is simply not a very good internet currency for buying trinkets. This is largely due to the lack of claw-back protection unless one uses a very cumbersome and expensive escrow or something.
Of course Bitcoin and it's cash-like qualities sounds like the cat's pajamas to the likes of logansyrche (or whatever his name was.) The guy was so stupid that I don't think he even realized there was anything wrong with taking someone's BTC and giving them nothing in return. The trouble is that about half the people in the world are of his caliber or below. Another fair fraction are Libertarians who seem to believe that it is a good and healthy thing to get screwed since that is the way markets develop or something.
Sorry, but as a consumer I'm not about to get screwed and it does not matter if its for $1.00 or $10,000.00.
Bitcoin has a great promise, and I think that there is some possibility that it will be realized, but it's not for exchanging trinkets. At least not directly. I sometimes wonder if Satoshi didn't design Bitcoin to be just barely usable enough to keep the network going on the backs of dead-enders who cling to some Utopian vision where they sit on their asses and get people to send them Bitcoin until they cannot produce results (through 'no fault of their own', giving them a legitimate reason default.)
Looks like I've made around 50 purchases on e-bay, and 4 or 5 of them have not gone through because the seller did not have the goods after all. In at least one case, I had to get PayPal to retrieve my money. I'll bet that had that not been an option it would get screwed by about 25% of the counterparties. (Actually, I bet that e-bay would not be able to stay in business.) I acknowledge that PayPal takes an unpleasant bit out of transactions, but from my perspective as a buyer, it is worth it.
What Bitcoin could do, and if it survives probably will end up doing, would be to provide backing value to currency systems which share it's distributed nature and some of the other niceties, but go farther to address some of the deficiencies that the 'real' Bitcoin has in terms of usability.