ok, what happened at BTC china the last few months of 2013?
They had zero fees and insane volume, and the prices rocketed from 130 to 1000 really fast.
What happened was this...
Market was pumped, people deposited money, they purchased (fractions of BTC) for large dollar amounts...
Then... The pump stopped, and the ones who pumped began to dump, taking that money, with little actual BTC lost in the process...
Why did it stop... Because now it takes MORE BTC to get that same $1000 than it did at the top of the pump, where they only lost (fractions of BTC), to get that money.
Now they withdraw cash... and no-one has money left to buy the overpriced BTC. Thus, price fall.
Welcome to the world of "Trades and exchanges"... Hope you learned enough this time, to thrive next time.