Hi,
In order to have some more investment I think that give a 10/15% of your fees to the top investor in the last 48h should be a good way to restart the investment.

This kind of incentive help you too to earn more coin:

at this point with a total of 715 BTC you have earn about 35 BTC, this means that the first investor of the last 48h can earn 3,5/5 BTC,
with this big amount of BTC many people will try to get it and you can easily reach 100/200 BTC of new investment that will cover and increase your earn.

...sorry for my bad English I hope you can understand what I wrote


Fabrizio