There are major causes as to why the price has been falling and trust me black Friday has nothing to do with this and no investor would just be withdrawing funds because of black Friday, so this is not making any sense.
I planned to spend some coins during black friday and cyber monday sales, but the market was sold off to such degree that I didn't proceed, and I'm sure that the majority of the holders didn't spend even one single satoshi.
In other words, that makes it even less likely that these holiday sales had an impact on the price. Bitcoin itself was subject to a heavy discount and at these prices it makes no sense to buy anything other than Bitcoin.
Maybe that an end of the year mini rally might motivate people to spend some coins on Christmas sales, but you simply can't count on anything with how bad the sentiment currently is...