Revolut - 11.5€ στο κρυπτονόμισμα DOT (το ποσό μειώθηκε σε 4.50€)

Καλησπέρα σας, απο σήμερα μου εμφανίζει η εφαρμογή της revolut  οταν πατάς στα Crypto και σκρολάρεις το Learn. Όπου μπορείς να κερδίσεις απαντώντας σε ερωτήσεις περίπου 11.5 ευρώ στο κρυπτονόμισμα DOT.  (29/7 το ποσό μειώθηκε σε 4.50€) Παρακάτω είναι και οι απαντήσεις , στα αγγλικά, στις ερωτήσεις για να μην κουράζεστε. Lesson 1 1. What is fiat money? (3) Government-issued money 2. What is the main difference between fiat currencies and cryptocurrencies? (2) Cryptocurrencies are decentralized, fiat money is controlled by a central authority 3. Who validates transactions on the blockchain? (1) Special users called "Miners" or "Validators". Lesson 2 1. Why is cryptography important for cryptocurrencies? (3) It eliminates the need for a central supervisor, eliminates double-spending and increases security 2. What are private and public keys? (4) A public key is like an account number and a private key is like the associated password 3. Which statement is true about private and public keys? (1) It is impossible to find out a person's private key by looking at their public key. Lesson 3 1. What is a Blockchain? (1) A decentralized database 2. Who can see the blockchain? (4) Anyone with a computer and internet access 3. What makes the blockchain different from a regular database? (2) It is not controlled by a central party and can be viewed by anyone. Lesson 4 1. What regulatory protection does a crypto asset have? (2) None - Crypto is unregulated in most countries around the world. 2. How much can you lose by buying crypto? (4) All - The value of your investment could drop to zero 3. When wouldn't it be right to buy crypto? (1)If you are in debt or you can't afford to lose more than you invested   * Polkadot * Lesson 1 Question 1 of 3 What are some limitations of early blockchains like Bitcoin? (3) Slow Transaction Speeds, High Fees, and Inability to Communicate with Other Blockchains Lesson 1 Question 2 of 3 What is Web 3.0? (1) A new web based on decentralized technologies where users have more control over their data Lesson 1 Question 3 of 3 How does Palkadot work around some of the limitations of previous blockchains? (2) It allows multiple blockchains to communicate with each other and process transactions simultaneously Lesson 2 Question 1 of 3 What is a relay chain? (4) A blockchain that connects other blockchains together and allows them to communicate Lesson 2 Question 2 of 3 What is a parachain? (1) A blockchain that connects to the relay chain and works in parallel with other parachains Lesson 2 Question 3 of 3 What problems do parachains and relay chains solve? (2) Blockchains' Inability to Communicate with Each Other Lesson 3 Question 1 of 3 Who can vote on the Polkadot Network for new initiatives such as network upgrades? (1) People who own a DOT token Lesson 3 Question 2 of 3 What is Polkadot's "On-Chain Treasury"? (3) A collection of tokens that can be used to support projects that benefit the network Lesson 3 Question 3 of 3 How is Polkadot's governance system different from some other popular blockchains? (4) It is governed by a community by vote Lesson 4 Question 1 of 3 What is the name of Polkadot's native crypto token? (3) DOT Lesson 4 Question 2 of 3 What is staking your DOT tokens? (1) Assist in securing the network by temporarily locking DOT tokens in exchange for a reward in DOT tokens Lesson 4 Question 3 of 3 What is the "bonding" of your DOT tokens? (1) Token locking to secure a spot for your parachain on the relay chain Lesson 5 Question 1 of 3 What are some use cases of Polkadot? (4) NFTs, DeFi, Smart Cities Lesson 5 Question 2 of 3 What differentiates applications based on Palkadot from the apps on your phone (2) Polkadot apps don't need a middleman for their work and can better protect your data Lesson 5 Question 3 of 3 How do apps communicate on parachains? (1) Via the relay chain