I'd give about a 90% probability to some tree shaking.
If wall street really is coming into the market, then I don't think things will ever be as easy as
1. Hold to moon.
2. ride out pullback.
3. repeat
Those days are gone. Its going to be a hard ass test of nerve from here on in. I think we'll hit those lofty 4 or maybe 5 figure targets in the fullness of time, but I think its going to be a bloody mess all the way up with whipsaws, jitters and stop farming all the way. Thats the way wall st plays, get ready to feel the fear.
If anyone thought holding through ~31, ~266 and ~1400 was hard, prepare for shake-a-geddon.
(imho)
I agree with that.
There's a similar thought I had, which probably in effect matches yours: the complexity of the market increases over time.
(where "complexity" is not a well defined concept I admit, but rather the intuition that simple methods and trading styles are made obsolete by more sophisticated ones)
Case 1: As a trader, you could have been riding out the 2011 bear market with almost perfect accuracy based on a 1 month EMA alone! Just that: one (exponential) moving average. Stay short while below, buy back once break through. Doing that, you would have sold almost perfectly at the top, and bought back almost perfectly at the bottom.
Case 2: Try the above in April 2013. You will fail badly. Whipsawing above and below the 30d EMA several times. But okay: some methods that aren't /much/ more complex worked pretty well (triangle breakout, daily CMF, fib levels) gave a pretty clear signal to me, from around $90 in July, that we were out of the correction.
Case 3: Try the above in 2014. 2 major swings that, at the time, looked like reversals, and both times, we went back to the low point again (400s), and in the last one made a new low. Not saying that TA doesn't work anymore, but I'm a lot more confused now than I was about a year ago.
What I'm trying to say is: I don't know if volatility will increase or decrease as a result of W.St. entering the game, but I expect the landscape for successful trading strategies to change: the "easy" ways to identify the bubble cycles, and sell near the top, buy back at the end of the correction, won't cut it anymore.