The Veintiuno Bitcoin Cards

The Fiat Currency Cards (The Colours)
These cards represent different types of consumer debt in the four major world currencies – the higher the number, the greater the "debt".
You want to get rid of them as quickly as possible because the remaining debt is added up at the end.
They come in the colors blue = € / green = $ / Red = GBP / yellow = Yen.
If the player cannot discard because neither the currency (color) nor the value match, then the player must draw another card from the debt pile, which they may discard if it has the right currency (color) or the right value. Then it's the next player's turn.
The Inflation Card (Take 2 Cards)
The next player must take on more debt to survive. They draw 2 more cards from the debt pile. The player cannot discard a card. The player after next is then automatically next.
This card can only be played matching the current currency or with the following exception: The top card of the repayment pile shows a +2 inflation card, then the player can discard their +2 inflation card. After that, it's the next player's turn.
The player can also play a +4 hyperinflation card, then it's also the next player's turn.
Of course, the player can also discard a Bitcoin card, then they don't have to draw a card and can even discard an additional card!
The Hyperinflation Card (Take 4 Cards)
The next player must take on even more debt to survive. They must draw 4 more cards from the debt pile.
This card can always be played.
The player can also determine which currency to continue playing in. The next player cannot discard a card and it's their turn.
Taking on more debt can only be avoided if the next player can also discard a +4 hyperinflation card, then it continues to the player after next.
Of course, they can also discard a Bitcoin card, then they don't have to draw any more debt cards and can even discard another card.

Interest Rate Increase Card (Change Direction)
Interest rates are rising and the player is stuck in the debt trap. They don't get a turn and remain stuck with their debts longer.
The game continues in the other direction.

The Currency Exchange Card (Change Colours)
If the player doesn't have a card showing the required currency and also doesn't have the required value, they can use the currency exchange card to determine that from now on the game will be played in this currency.
They cannot discard any more cards, it's the next player's turn.

The Opening Hours Card (Skip Card)
Unfortunately, the player cannot repay their debts because the bank is closed on weekends and holidays. They may only discard cards and continue repaying debts in the next round, unless they also have an opening hours card, then they may discard this and the opening hours card rule applies to the next player.
This card can only be played if the currency matches or an opening hours card is on top.
The Bitcoin Card (Strongest Card)
The Bitcoin card with a large Bitcoin in the middle is the only card that protects against both the +4 hyperinflation and the +2 inflation and is particularly valuable when the sum rule is applied.
It can always be played when it's the player's turn - without exception.
Another card can be discarded with the Bitcoin card to get rid of debts faster, this additional card then also determines the currency in which the game continues.