Current Market cap is 120b $ (actually real market cap much lower than that due to lost btc and so on); that could be 1000 people with 120m$ hidden. Anyone who has approximately that amount of btc would be very able to buy the market would it temporarily drop significantly below 5000$ per btc, due to the very limited (and shrinking) actual supply of bitcoin and availability in the exchanges.
There's these school of thought I believe in, it says "In Cryptocurrency everything is possible" it has been proven to be true every time it's been put to test.
Example, you wrote this post August 06 and today is September 15. Since then bitcoin has lost nearly $7billion dropping market cap to ~$113Billion. Hope you know this market cap can also drop to ~$87billion at anytime and if that happens bitcoin will drop to around ~$5000 not saying this will happen but it's a probability.
You are exactly right on the part that in cryptocurrency anything is very possible. The price of Bitcoin could go below 5000$ and can as well stay ahead 6000$. And investors should not be carried away by investing all their hard earn cash, kindly use your investment strategy.