PlanB-Network · PBN-bot · Mar 25, 2026 · Mar 26, 2026
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diff --git a/courses/biz101/en.md b/courses/biz101/en.md
diff --git a/courses/biz101/quizz/006/en.yml b/courses/biz101/quizz/006/en.yml
@@ -3,7 +3,7 @@ answer: It creates a deflationary asset, protecting its value against arbitrary
 wrong_answers:
   - It ensures that governments can print as many bitcoins as needed.
   - It prevents anyone from sending transactions after the cap is reached.
-  - It eliminates all volatility in Bitcoin’s price.
+  - It guarantees that Bitcoin’s price will rise every year.
 explanation: |
   With a maximum supply of 21 million, Bitcoin’s scarcity is hard-coded, making it fundamentally different from inflationary currencies, where supply can be increased at will.
 reviewed: true
diff --git a/courses/biz101/quizz/011/en.yml b/courses/biz101/quizz/011/en.yml
@@ -1,5 +1,5 @@
 question: What advantage does Lightning offer merchants regarding payment finality?
-answer: Payments on Lightning finalize almost instantly, reducing the risk of reversals or fraud.
+answer: Payments on Lightning finalize almost instantly, with no possibility of chargebacks or reversals.
 wrong_answers:
   - It requires 24 hours of waiting before funds are spendable.
   - It allows customers to reclaim their payment at any time.

diff --git a/courses/biz101/quizz/021/en.yml b/courses/biz101/quizz/021/en.yml
@@ -3,7 +3,7 @@ answer: Bitcoin can potentially outpace real inflation and is not tied to the il
 wrong_answers:
   - Real estate is always cheaper than Bitcoin and never needs maintenance.
   - Bitcoin provides government-backed guarantees that real estate does not.
-  - Real estate appreciates faster than Bitcoin under all market conditions.
+  - Real estate is exempt from the effects of monetary inflation unlike Bitcoin.
 explanation: |
   Real estate often involves liquidity constraints and ongoing costs, and may not keep pace with the hidden inflation in a debt-based monetary system. Bitcoin’s scarcity and global reach offer a distinct store-of-value proposition that may outperform traditional assets in the long run.
 reviewed: true
diff --git a/courses/biz101/quizz/023/en.yml b/courses/biz101/quizz/023/en.yml
@@ -1,4 +1,4 @@
-question: Which of the following is NOT one of the three primary methods mentioned for acquiring Bitcoin?
+question: Which of the following is **NOT** one of the three primary methods mentioned for acquiring Bitcoin?
 answer: Receiving Bitcoin as a government grant for business development.
 wrong_answers:
   - Obtaining Bitcoin in exchange for goods or services.

diff --git a/courses/biz101/quizz/040/en.yml b/courses/biz101/quizz/040/en.yml
@@ -1,5 +1,5 @@
 question: Why might a business choose to hold Bitcoin as a long-term investment on its balance sheet?
-answer: Because it may serve as a store of value, potentially appreciating over time and providing a hedge against inflation.
+answer: Because it may serve as a strategic long-term asset that can preserve or grow in value over time.
 wrong_answers:
   - Because it ensures the immediate elimination of all currency-related taxes.
   - Because it’s required by international accounting standards.

diff --git a/courses/biz101/quizz/045/en.yml b/courses/biz101/quizz/045/en.yml
@@ -4,6 +4,6 @@ wrong_answers:
   - The desire to reduce short-term costs  
   - The optimization of immediate investments  
   - The ability to balance supply and demand  
-explanation: |  
-  Time preference refers to the preference for immediate consumption over deferred benefits, which influences decisions on saving and investing.  
+explanation: |
+  Time preference refers to the natural human tendency to prefer immediate consumption over deferred benefits. In Austrian economics, individuals with a low time preference are more willing to save and invest for the future, which is essential for capital accumulation. This concept helps explain why some businesses choose to hold assets like Bitcoin as a long-term store of value rather than spending all resources immediately.
 reviewed: true  
diff --git a/courses/biz101/quizz/046/en.yml b/courses/biz101/quizz/046/en.yml
@@ -2,7 +2,7 @@ question: What is the primary function of currency?
 answer: To act as an intermediary that simplifies the exchange of value
 wrong_answers:
   - To store intrinsic value in physical form
-  - To replace barter completely with direct goods-for-goods exchange
+  - To serve as a government-issued store of wealth for citizens
   - To centralize all economic transactions through a single authority
 explanation: |
   Currency simplifies trade by serving as a common medium that reduces the complex web of exchange rates needed in a barter system, thereby facilitating easier transactions.

diff --git a/courses/biz101/quizz/047/bg.yml b/courses/biz101/quizz/047/bg.yml
diff --git a/courses/biz101/quizz/047/cs.yml b/courses/biz101/quizz/047/cs.yml
diff --git a/courses/biz101/quizz/047/de.yml b/courses/biz101/quizz/047/de.yml
diff --git a/courses/biz101/quizz/047/en.yml b/courses/biz101/quizz/047/en.yml
@@ -1,9 +1,13 @@
-question: Why is scarcity an essential property of a good currency?
-answer: It preserves value
+question: "What is the main problem with a barter economy that currency solves?"
+answer: "It requires a double coincidence of wants, meaning both parties must desire what the other offers at the same time"
 wrong_answers:
-  - It guarantees that only physical assets can be used as currency
-  - It ensures that the currency is widely available to every individual
-  - It ensures that the currency must always be backed by a commodity like gold
-explanation: |
-  Scarcity prevents the excessive creation of currency, thereby maintaining its value and purchasing power over time.
-reviewed: true
+  - "It makes transactions too fast for proper record-keeping"
+  - "It forces governments to regulate every exchange individually"
+  - "It only works for physical goods and cannot handle services"
+explanation: >-
+  In a barter system, trade can only happen when two people each want what
+  the other has at the exact same moment. Currency eliminates this constraint
+  by acting as a universal intermediary: a farmer can sell wheat for currency
+  and later use that currency to buy shoes, without needing to find a
+  shoemaker who specifically wants wheat.
+reviewed: false
diff --git a/courses/biz101/quizz/047/es.yml b/courses/biz101/quizz/047/es.yml
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