Suggestion: New Utility for Gold & Player EXP

I'd love to hear the community's thoughts on how gold and player EXP could be made more useful for veteran players, especially those who have no meaningful use for these resources anymore.

For context, I currently have 12 million gold and 1.2 million player EXP just sitting idle. At this point, they serve no real purpose, and I'm sure others are in the same boat, some which absurdly more gold/player exp.

Here are a few ideas that could add value:

Gold-Based Challenge Event: Introduce a permanent or rotating event that costs gold to enter or progress through missions. This would create an engaging gold sink with rewards that scale by difficulty.

Gold Coin Shop: Similar to the Snow Raid currency, implement a weekly/monthly gold store where players can purchase items like recruitment tickets or cosmetic content using gold.

EXP-to-Grit Fragment Converter: Allow player EXP to be converted into grit fragments. For example:

X amount of player EXP = 1 random S/A/B/C/D tier fragment/generic fragment

Player EXP Overcharge Buff: Spend player EXP to temporarily boost the stats of a selected player. For example: amount of player EXP = +X% stat increase (e.g., attack, speed, defernse) for 48 hours. This creates a strategic use for excess EXP while keeping the boost time-limited and balanced.

This would make earning player EXP feel rewarding again without affecting balance too drastically.

Would love to know what others think and hopefully, the devs take some of this into consideration!