Suppose that you have both Bitcoin, USDT and e-HKD (assume that e-HKD is legalized and available) in your digital wallet. (i) If you want to buy a cup of coffee, which of the above currency is most likely to be used? Why? (ii) Which of the above currency is better for investment purposes? Why? (iii) What is the main difference between NFT and the above currencies? (iv) What is the main difference between e-HKD and tokenized deposit? (v) Which one is more volatile in market price: Bitcoin, USDT, e-HKD, tokenized deposit, or NFT