I read of someone transferring a billion dollars worth of bitcoin and some people speculated that if it hits exchanges, it would cause bitcoin to drop.Do you guys think this is the cause or maybe it's just a bear trap?
There is too much speculation, too much.
Whenever an event such as price rises or price falls occur, there are numerous reasons for it and though there might be a couple of 'main' reasons the truth is it is almost impossible to work out all permutations to find out what triggered the event whether it was a fall in price or a rise.
keep in mind that there is a big difference between speculation and random nonsense FUD online. speculation is when you are analyzing the market, fundamentals,... and trying to find things that actually affected the market. everything else like the one he is talking about (someone moving large amounts of bitcoin around) is just bullshit there to scare newbies into selling their small amounts of bitcoins!