It was all because of the ETH rally. People selling their BTC to buy into ETH. The price will probably correct to the almost $3,000 mark here in a few days. This just tends to happen when a big coin gets boosted. People are going to panic and fomo will kick in.
Partly yes but I would also say it was just a general healthy market correction that will ultimately prevent a much bigger dump in the future.
The bancor ICO also made people reconsider a lot of things.