Most people who think it "won't ever touch $15k again" haven't been around since the early days.  Every bull run so far has been followed by a bear market decline of a minimum of 80%

Don't be over-confident.  What goes up must come down.  The positive though is that the bear market declines are getting less severe over time, and the price is stabilizing as it goes higher. 

The last bear market was a crash of nearly 85%.  Many alt coins crashed 99% lol. 

Reality check - the US economy is at an all-time high and stocks are increasing despite record unemployment and many other indicators of recovery outlook. 

Bitcoin is rising due to Tether (China capital outflow) and stimulus pumping companies.  As 'wallstreet' becomes more intertwined with bitcoin, the price correlates more closely with US economic indicators. 

What happens if the US economy tanks?

My prediction is that those institutions that bought have agreed upon stop loss points where their investors will not tolerate any further losses.  Those kinds of selloffs will easily cause a bear market decline of 70-80%. 

I enjoy every couple years a bunch of overly optimistic people come here saying "it's never going as low as $$$" and then a couple years later a bunch of overly pessimistic people say "it's never going as high as $$$... bitcoin is done" lol.  It's a cycle.  Ride the waves, but just know it goes in both directions.  Don't get caught up in the hype train or the doom gloom.  Ultimately we will go to $1mil, maybe not in my lifetime, but who knows.