I always back my raw files up to a NAS two bay drive mirrored. Separately I store my Adobe edited photos on a drive that's also backed-up to the cloud. The originals are simple RAW whereas my edited shots are either DNG. or JPegs (for camera club comps).
Its dangerous to have everything in DNG. and limit yourself for the future. Nokia was king of the castle, so was Kodak that maybe Adobe in the future.
Canon 5DS, Canon 6D, 16-35 f4L IS USM, 17-40 f4L USM, 28 f2.8, 24-70mm f4L IS USM, 24-105 f4L IS USM, 100mm f2.8L IS USM, 70-200 f4L USM, 70-300 f4-5.6 IS USM, 50 f1.8 STM, 100-400mm f4.5-5.6L IS USM II, 1.4EX III, Canon G7 X, EOS 760D EF-S 10-18mm f4.5-5.6 IS STM, EF-S 18-55mm f3.5-5.6 STM