I believe BTC should be in the $150 range. There is nothing to support any higher of a price.
What makes you say that?
Because at this point there are a lot of exciting projects in the works for BTC. Key word in the works. One ATM and a letter from Bernake saying BTC is legit and we can't really regulate it doesn't make it worth $600. I am willing to place a value on the speculation of what could happen but until it does it's not.
Look at it this way; If I asked you to invest in my company that had some great projects in the works that will make us billions would you give me a billion dollar valuation right away or would you want to come in at a more sensible valuation because we are so early on? You're not going to make an investment based on what it could be, you will invest on what it is.