Add Gamified Layer - Collections

Currently the cryptobond artwork is amazing and definitely appeals to a mix of yield seekers and NFT collectors. However, I feel there's perhaps lacking a reason to collect beyond the financial and aesthetic. I propose adding "collections" within the artwork series, with added rewards to completing collections of varying difficulty.

For example if someone owns a full series (Common, Rare, Epic, Legendary, etc) of any pair, they get a boost of some kind. Additionally if they own a series of the SAME pair (ETH/SYNC for example), an even better reward is unlocked. My initial thoughts are an increased SYNC haul, or the ability to cash the bonds in sooner than maturity, something to that nature. But the point is to drive demand to creating/purchasing bonds other than stable yield and cool artwork.