A few years ago, my friend Sarah decided to invest in cryptocurrencies. She was always tech-savvy and intrigued by the prospects of digital finance. One evening, she excitedly told me over coffee that she had bought a modest amount of Bitcoin and Ethereum. At the time, I was skeptical and joked, "So, you're buying imaginary money now?" Fast forward to 2021, and Sarah's small investment had ballooned into a substantial sum. She used part of her gains to fund a dream trip to Japan, something she’d always wanted to do. Over sushi one night in Tokyo, she chuckled and said, "Who's laughing now?"