When prices are dropping I noticed that once ETH surpasses 200, it starts rallying,
Some times it goes to 150ish but then always above 200$. What do you think is the bottom?
The bottom is literally 0$, once the cards start crumbling and the whole thing becomes unsustainable, but for the time being I wouldn't worry too much, I think ETH will see ATH in the next wave of crypto hype once BTC starts nearing $6000. We will have, once again, all the noobs getting in at the top, then correction to a new higher floor ad infinitum.
$10,000 is looking good for 2018, and all the altcoins will follow the BTC price so new altcoin bubbles will be formed and ETH will be one of them.
There is a short term bottom and a long term bottom. Sooner or later it will be zero. Short to medium term about $150 is my best guess.