So why did the coin drop from $300 to $0.1
Price did not drop, there was splitting because price was to high (higher then BTC), 1 old XAU = 8000 new XAUR (july 2016).
XAUR is from that momment on the ethereum blockchain like a ERC20 token.
Very interesting information. Honestly - I do not know about it. Thank you. But what really clean a coin with one of the major exchanges is not very good. Maybe the team will try to add a new exchange, because much volume will fall. Hopefully the price will rise in the future.