Dogecoin has been added to PoloniEx Futures and can be traded at high leverages now. Not sure if this is the first exchange to do so, but I haven't heard of others. PoloniEx is #12 on this ranking https://coinmarketcap.com/rankings/exchanges/ with a 24h volume of 182 million $, so this is quite big news imo and the bigger players surely are watching.
https://poloniex.com/futures/trade/index/DOGEUSDTPERP
https://twitter.com/Poloniex/status/1372534909403688962