this literally never happens unless someone is very sure that good news are about to be released.
This is what is fuelling the insider trading allegations and not the short trading action
at Coinbase until they halted trading. The run of Bitcoin Cash at other exchanges
in the hours before the start of BCH trading was the suspicious event.
This screen cap from Reddit supports insider trading theory.
image source: https://twitter.com/ToneVays/status/943554975321542657/photo/1
I still have not heard why Coinbase listed BCH without warning. I understand that insider trading is rampant on Wall Street, so I can only imagine it is even worse in the cryptocurrecy market being that there is less regulation. With that in mind you would think the logical thing to be if you are a 'unicorn' is transparent. They are known for being one the most trustworthy Bitcoin startups in business. I feel it is necessary for Brian Armstrong to make a public statement explaining his reasoning behind this move.