A quick search on google or reddit will reveal that Dosh is money, As a crypto it can be branded and related to by a large comunity, but it might not have the same effect in all languages or countries, so cryptos that will have the same marketing and meaning can be created and developed to cater for eCommerce, mobile phone apps and walk in shopping. The added benefit is that they are linked together and make global transactions possible without one crypto having to please everyone. This leaves space for individuality and an all important market. One could also create a Crypto, "Poker Chips or MusicNote" for example that have a specific function but will need to be part of a collective to survive.
Crypto Silver, and will fill much the same function as real silver did in yesteryear, it is the front loading single shooter. There is space for 4 crypto commodities and Silverback is the entry level.
Diamondback however is for the Claymore cannons, it has a low block rewards, with just 3 decimals to make Diamond dust mining unattractive.