BAT has gone down by nearly 10% in the last week, and so have a lot of other cryptocurrencies, including 0x, Dash, Litecoin, OmiseGO, Nano, both BTC and BCH, and tons more.
Now is a great time to buy crypto, as a down almost always means an up. If you dont know how to do quick selling and rebuying, then I recommend heading over to MadMaxx’s posts, as he is a professional trader himself: https://www.publish0x.com/@MadMaxx