Put your tinfoil hats on. While this conspiracy theory will sound crazy to some (probably to majority), I find it very possible knowing in what kind of world we live.
Elite at play. Newest fraud of theirs, namely ZCash. They decided for a push there because they realised they must somehow join the crypto-finances and extract as much wealth as they can and also stay in position to emit money, this time even better - while it's anyone's guess how much do they emit.
You felt the carefully prepared ZCash hype for very long time? You're feeling that something is wrong with alt markets today? It's all carefully planned and executed. That ~3200 BTC/ZEC price was almost certanly executed where buyer is also the seller, just to push the hype further.
And while many people will see the things I'm talking about, I'm affraid majority is still helpless, buying the hypes, so I don't know exactly when this crash will end. You just need to know that the enemies of good and honest crypto-finances are the ones that emit fiat money and they won't gamble if our experiments succeed, they will fight and today they're winning the battle. It's up to us whether they will win a war.