A "Gem Mint" 10 graded by trusted experts like PSA, BGS, or CGC can be worth 100x more than a "Near Mint" 7
There are things like Bronze Walrus to scry, Biblioplex Assistant for spell recursion, Canoptek Scarab Swarm for graveyard hate and token generation, Canoptek Spyder and Circuit Mender for card draw, Duplicant for exile, Scampering Surveyor, Myr Battlesphere, Pentavus, Pilgrim's Eye
This card doesnt target so it prevents damage from sources protected by shroud or hexproof, making it an excellent answer to Voltron commanders like Uril, the Miststalker
If you dont need the money and the space isnt an issue, holding them for five or six years is almost always going to provide the best chance of a great return with almost no risk of losing your shirtas I said earlier, even boxes from bad sets are still fairly valuable
Its simple: One mana to reanimate a creature with the only actual drawback being the life lost in the process
Then when this swings, you'll shoot the attacked player equal to their artifact count