Theres that many coins now that its take awhile to stake, 70m could take a month. It will stake just be patient.

Info for everyone:
For regular stakes least once a week you need at least 200mill. As you cant send more than 99mil. You have to send yourself a low amount like 0.00000001 then the "change custom address" to your own and the change will be sent to you but there's a bug so no more then 850mil can be sent (https://github.com/EmberCoin/Ember/issues/35) but you want to send less as you need to think about your stake so I would say 700mil max as change.