To answer your question, you first have to be mindful of BTC/USD

if 1 BTC = $1000, $1 = 0.001 (100000 sat)
if 1 BTC = $10000, $1 = 0.0001 (10000 sat)
The highest DGB has ever "touch" was 998 sat.

I think it is possible 3-5 years from today...to "touch" $1, and it can baseline around $1...7-10 years from today.
Here is another way to look at it:

It is very possible for 1 BTC = $2000-$4000 before End 2017.
It is very possible for 1 DGB = 500-1000 sat before End 2017.

If 1 BTC = $2000 and 1 DGB = 500 sat, 1 DGB will be 1 cent.

for many of us, DGB hitting $0.01...is already GRAND.