Digibyte is definitely a long term investment. Guldencoin also looks like it might have the best developer now in the crypto field just no one knows it yet and also a long term investment.
Digibyte will be doing new updates and bringing out innovative features. Watch this space!
Digibyte doesn't have a premine and developer is not anonymous which are a big plus!
If you terrible at trading like myself and just want a solid investment and decent growth over 5 years you can't go wrong with the 2 coins I mentioned above, if you into gambling then you have plenty other coins to choose from.