Points

Points is one of the Tower's main monetary unit. It is almost exclusively depicted as a digital currency, as the user can use a Pocket to perform a transaction to a third party. Points are mostly used by Regulars and Rankers.

About
Since the Tower is so large, each area has their own currency units but among the Regulars and the Rankers, they use Points. SIU label points as a very loosely defined concept for a currency, however, they can be bought using official regional currencies. Of course, they can be exchanged as well. Since each region of the Tower has their own values for money, so the exchange rate changes.

Yet in most regions, having 100,000,000 Points would mean a person is "filthy rich". Unless the said person is near the regions where the families are based on (Because currency worth differs) but still, 100M Points is a huge amount of money in the Tower. With such amount of money, a Regular can ditch the Tests, go into the Middle Tower and live out the rest of their days rich.

Among High Rankers, these individuals tend to be extremely wealthy compared to other Rankers. For example, Ha Jinsung is considered to be extremely wealthy for giving 10 Billion points during the Festival that takes place at the Name Hunt Station for a regular.