Bubbles everywhere: Current risks to the US stock market rally

Pick your poison, I mean your favorite bubble:

• real estate (Vancouver's housing bubble)
  
• student loan debt
  
• tech stocks and startup unicorns
  
• bonds
  

I just picked some random news articles for each bubble. In case I forgot one major bubble please tell me in the comments.

Real estate: Chinese Media Warns Canada's Housing Crash Will Put U.S. To Shame
huffingtonpost.ca/stephen-punwasi/canadian-housing-crash_b_11349292.html
advisorperspectives.com/dshort/updates/House-Price-Index.php
advisorperspectives.com/dshort/updates/Case-Shiller-Composite-Home-Price-Indexes.php

The $1.3 Trillion Student Debt Bubble
marketrealist.com/2016/08/1-3-trillion-student-debt-bubble/
advisorperspectives.com/dshort/commentaries/College-Tuition-and-Fees-130718

Tech: We've officially reached the last stage of the unicorn boom
businessinsider.com/saudi-investment-in-uber-last-stage-of-unicorn-bubble-2016-6

US hedge fund giant warns of 'biggest bond bubble in history'
telegraph.co.uk/investing/bonds/us-hedge-fund-giant-warns-of-biggest-bond-bubble-in-history/
marketwatch.com/story/why-hedge-fund-honcho-paul-singer-is-calling-this-the-biggest-bond-bubble-ever-2016-08-18


Here are two bearish scenarios: A "the pullback" and B "the crash":

Short entry A: 2175 (or 2185) points
Target A: 2025 points

Short entry B: 2160 points
Target B: 1850 points

Stop loss: 2215-2200 points