For the purposes of this debate, the following core tenets of the religion Catholicism are presumed to be true - there is an afterlife, including heaven, purgatory and hell, an omnipotent God exists, Jesus is the Son of God, and the concept of sin and forgiveness of sins exists. Virtuous acts are those rooted in love and fear of God, whilst sin is rooted in cruelty and selfishness. There are competing ideas within the church as to what constitutes a sin and what constitutes a virtuous act. Incontrovertible evidence exists which proves that these, and only these, tenets of Catholicism are true. This evidence is widely accessible.
The Catholic Church has recently developed its own cryptocurrency, called VatiCoin. VatiCoin are tradable digital tokens which can be bought and sold on the open market. When owned, VatiCoins forgive the sins of those who own them. Individuals which own more VatiCoins have more of their sins forgiven, in proportion to the amount of VatiCoins they possess. The amount of VatiCoins required to forgive each individual sin is proportional to the size of the sin.
There are a limited number of VatiCoins in existence. There are no similar currencies which exist or can be manufactured with similar properties. The Church has power to control the exchange of VatiCoin to some degree, to prevent hoarding or other undesirable outcomes. Upon the death of the holder, VatiCoin returns to open exchange and it cannot be stolen. Buying and selling VatiCoin is neither a virtuous act nor a sin.