An Introduction to 슈어맨
https://www.fxstat.com/en/user/profile/casino3m7vsbbw597-340529/blog/37405001-Will-%EC%8A%88%EC%96%B4%EB%A7%A8-Ever-Rule-the-World?
It is possible to exchange cards with other players. The purchase of a single card is a great method to gain an edge over your opponent. Trading will allow you to own more cards but it is not always the best option.