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It is extremely unlikely that Bitcoin could reach a price of over, say, $3000 in 2017.
There are way too many people who would sell at $1200 - $1400 (over its previous all-time high) vs. potential new buyers. I see nothing in the current dynamics of BTC mining, BTC demand, and BTC acceptance by merchants to give me hope of a huge & majestic move to very high numbers in a year or so.
However...
It is very possible that in the next 2 - 5 years (or so) that BTC demand could take off as more people get into it (and we hope) more merchants will accept BTC as payment. The long-term prospects are not bad at all (that assumes, of course, that BTC does NOT have a fatal flaw nor that a new coin does not destroy it).
$100,000 per Bitcoin could come, but not until demand goes UP and the mining reward gets slashed in half again. But, this is all unknowable...
Of course, 100K in 2017 is unrealistic, but quite possible in the log run.
At 100K, bitcoin would still be just 29% of gold above ground value.
I am sure that sidechain could be developed for everyday transactions.
say, "coin" or "btc light" exchanged at fixed 1:100000 to btc.
Then, such "coin" would be $1-a practical value for everyday purchases.
You would have 10-200 coins on your phone.
BTW, I am fully ware about bits (1:1000000), but they are smallish.