pseudo spindle
I would like to suggest if that they add more easier way to obtain more Yens and here the new ways and changes.
Method 1: Fishing
Add where like there is old man with a net and you had to get 150 yens to get the Net. This net would help you catch up some fishes in the Sea of the Waterfall and example you catch a Salmon you can sell it for 35 Yens or lower and same with other different fishes and there is a top rewarded fish where you get 1k if you catch the fish.
Method 2: Spars Rounds
Add where like there is a boxing area and you fight a strong well NPC and you bet with him on how much you pay if you loose and how much he is paying like you pay 300 yens and he pays 300 yens and winner gets 600 and diff would change depend on how much you pay such as 1k or 2k would be alot harder and you can use it every 5 hours irl.
Method 3 (Last Method): Treasury Collector
Add where like there is different Treasury to sell like Trinkets or smth example you found a Rusted Bowl and you can sell it for 5 Yens or lower and you found a Gold Chest and you can sell it for 425 Yens or lower and same goes by.
This would actually make Yen easier to obtain and you can get it easier.