1 - Grayscale Investments recently announced its intention to sell the bitcoin cash held by its Bitcoin Investment Trust (OTC: GBTC) — a fund that currently holds more than $1 billion in assets — and distribute a dividend to its shareholders according to the below link.
https://www.cryptocoinsnews.com/bitmex-to-dump-bitcoin-cash-and-credit-users-with-bitcoin/2 - Some exchanges will credit Bitcoin holders per 1 august 2017 with Bitcoin cash on december 2017 and January 2018 which can result in selling free money for christmas expenses or for ideological reasons.
3 – Bitcoin has several possible upcoming hard forks that can lead to many want to hold Bitcoin to get the free coins.
Super Bitcoin, Bitcoin Platinum, Bitcoin Uranium, Bitcoin cash plus, Bitcoin silver, Bitcoin lightning network, Bitcoin century, Bitcoin Diamond - it seems like more and more Bitcoin hard forks are on the way.
Bitcoin Platinum shedeleued to fork on dec 12 , 2017
Bitcoin Cash Plus hard fork schdelued to fork between dec 12 and jan 2, 2018
Super Bitcoin shedeleud to fork on dec 15, 2017
Lightning Network shedeleued to fork on dec 23, 2017
Bitcoin Uranium shedeleued to fork on dec 31, 2017
The date of the fork for the other coins are still unknown.
All the details about the upcoming forks are at the below website:
https://hype.codes/bitcoin-possible-upcoming-hard-forksNews about Bitcoin Diamond & Century hard fork
https://news.bitcoin.com/initial-fork-offerings-ifos-the-new-way-to-fund-crypto-projects/News about Bitcoin “lightning network” hard fork
https://news.bitcoin.com/the-first-dpos-hard-fork-lightning-bitcoin-is-on-the-way/