Regarding the bottom? Who knows.
Assume you bought ETH during the ICO for 40 cents. Would you care if ETH broke $100 if you already took some profits earlier at $1000? I am sure most of the early adopters are not selling now, but they aren't buying back the ETH either. Most of the selling now is probably from the GPU miners with 1080Ti GPUs which need to be paid off and from the ICOs who still haven't sold their coins.
Agreed with you $100 is looking psychological barrier big players are playing with the emotions of weak hands. It need good support to make comeback and start recovering but it is very hard to see when it will start recovering.