I do think a large retracement is on the cards in the not-so-distant future. Bitcoin has exhibited a fractally repeating pattern, do we bet against another iteration?
Indeed that fractally repeating pattern is happening as we speak. It's all a matter of where we are in the pattern.
This is why I like to see regular corrections as we go. As long as it's a steady line on the log chart we're OK. It's when it veers upward too quickly as it did in June 2011 or late March/early April or late November 2013 that it becomes a bubble and is destined to crash.
If we can keep the rise steady like in winter/early spring of 2011, or winter or mid-autumn of 2013, we could see some longer-lasting gains.
So far since early springtime, 2017 has been nice and steady, correcting whenever it's gotten close to running away:

Eventually it will almost surely move up to quickly and crash. Last year I thought that it would make it to $6k-$8k and crash to maybe $2k. We've already passed that and we're still going relatively smoothly.
If we can keep from bubbling up, we might make it to $50k-$60k before crashing to somewhere higher than we are now.
Just my 2 satoshis.
max keiser says the cost to make a bitcoin is $1OOO :-D wut