Do You Keep Your 'NEF's"?

Hi there,
I currently use ACR to process my photos and save a copy of my RAW images with the original NEF embedded in it...
I keep the original NEF along side the DNG file (with NEF embedded)...
Is it safe only to keep the DNG and discard the NEF file or should I continue to keep both versions?
Paul
I currently use ACR to process my photos and save a copy of my RAW images with the original NEF embedded in it...
I keep the original NEF along side the DNG file (with NEF embedded)...
Is it safe only to keep the DNG and discard the NEF file or should I continue to keep both versions?
Paul