The CEO from Xapo expects a price of 500 to 1 million dollar per BTC in the next 10 to 20 years. It sounds insane but so did BTC ever reaching 1K back in 2009. If Bitcoin manages to be the #1 worldwide electronic money transaction system it is pretty much guaranteed that we'll see something along the lines, but we aren't used to seeing assets being worth that much "per share" so it creates cognitive dissonance and it makes you think it's impossible, but it isnt.
That is,
IF Bitcoin manages to be the #1 worldwide electronic money transaction system.
But recent stats and developements points to a decline in Bitcoin adoption and usage. The trade volumes are significantly down for the past 6-7 months, even with factors such as the Greek crisis. And the Bitpay CEO has said that they have seen a sharp decline in people using their coins to do the shopping.