Cycling behavior of the market + massives ICO being cashed out = rollercoaster time.
Just look at the BTC/USD or EUR value history, doing down then months later, new "all time high". It's not anormal.
But there is still a chance that this time is different, we will never know.
You are right, there are several factors that push down or pull up the prices, i would to add at this moment the high probability of a bitcoin hardfork.
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