鸣谢
金银币
特别感谢 Numista 分享关于金银币的信息（重量、直径、纯度、图片、铸造年份等）。 Numista.
Pocket Pinger
感谢 Sound Money Metals 发明了一种物理装置来防止金银币掉落，并感谢他们的合作。 Sound Money Metals.
设计
- Lock icons created by Pixel perfect - Flaticon
- Unlock icons created by Freepik - Flaticon
- Benefit icons created by Freepik - Flaticon
- Access icons created by Flat Icons - Flaticon
- Three icons created by Uniconlabs - Flaticon
- Free icons created by Pixel perfect - Flaticon
- Treasury icons created by edt.im - Flaticon
- Trophy icons created by Freepik - Flaticon