4. Holding Duration Multiplier

Earn bonus points for holding assets over time, encouraging long-term commitment:

Duration	Bonus Points Per Asset (by Rarity)
Monthly	Common: +0.5, Uncommon: +1, Rare: +2, Ultra Rare: +5, Legendary: +10, Mythic: +20
Milestone (6M)	+5% total score for that asset
Milestone (12M)	+10% total score for that asset
Milestone (24M)	+20% total score for that asset