#Gate广场四月发帖挑战 Am I able to profit at others' expense, or am I just waiting to be exploited?

Talking about cryptocurrencies, people might find it unfamiliar, but many have heard of Bitcoin, Dogecoin, and the wildly popular Trump Coin from before. Today, let’s follow along and clarify what exactly cryptocurrency is.

What is cryptocurrency?
Simply put, cryptocurrency is "digital cash," but the cool part is that no one controls it—no banks, no central banks backing it, it runs entirely on code! The core is that often-discussed “blockchain,” which you can think of as a publicly accessible “super ledger” across the entire network. No matter who makes a transaction, it must be recorded in this ledger—cannot be altered or deleted! So, how does it stay secure and prevent theft?

It relies on the “public key-private key” pair! The public key is your “receiving address,” which you can share freely; the private key is your “payment password + ID,” and losing it means losing your money! During transactions, a “digital signature” is also required, which is like a tamper-proof seal on the transfer—others can’t forge it.

What’s the most amazing part? This ledger isn’t controlled by a single person; it’s monitored by countless computers worldwide! If you want to change a record, you need to convince most of the computers globally—more difficult than convincing your partner to admit they’re wrong!

Since Bitcoin first emerged in 2009, followed by Ethereum and other “followers,” they all fundamentally operate on this “self-governing, collective oversight” logic. They can be used for direct peer-to-peer payments and also for investment. No wonder so many people are hooked!

In simple terms: Cryptocurrency = cryptography for theft prevention + blockchain record-keeping + no central authority—do you get it now?

The “variety of virtual currencies”

01 “The Grandmaster” — Bitcoin
On January 3, 2009, a mysterious figure called “Satoshi Nakamoto” (no one knows who he really is—could be an individual or a team) launched Bitcoin—a virtual currency without a central bank, not controlled by any institution, running solely on a network of global computers. It has two core features: first, a fixed total supply of 21 million coins! Like a limited edition drink, each one mined is one less available—once mined out, it’s gone. Estimated to be fully mined by 2140, this scarcity is a major selling point!

Second, decentralization. No single entity can control it. Printing more? Impossible! Altering transaction records? You’d need to convince most of the global computers—imagine how hard that is! An essential operation for Bitcoin is “mining.” Early on, ordinary computers could mine it; now, specialized mining rigs are used, performing trillions of guesses per second to find the right “hash.” Successful miners get rewarded with Bitcoin! But this process consumes huge amounts of electricity—like running hundreds of air conditioners 24/7.

What’s Bitcoin’s current status? From just a few cents per coin, it soared to nearly $70k at its peak—truly the birthplace of “wealth creation myths”! But it’s also a “madman,” with prices swinging wildly—up 10% today, down 20% tomorrow. Some have made a fortune, others lost everything. Now, many treat it as “digital gold,” hoarding rather than spending—because buying a cup of coffee with Bitcoin might cost more in transaction fees than the coffee itself, plus it takes ten minutes to confirm. Not very practical!

In summary, Bitcoin is a digital asset created by Satoshi Nakamoto, secured by blockchain and cryptography, with a fixed supply and no central control.

02 “The Comedian” — Dogecoin
In 2013, the popular Shiba Inu meme was everywhere. Two American programmers, in their spare time, suddenly had an idea—“Why not create a joke coin?” They modified Litecoin’s code, replaced the logo with a Shiba Inu, and thus Dogecoin was born—casually! Early on, on foreign forums like Reddit, people used it as “social tips”: a creator posts a funny video, an uploader shares a useful tutorial, and the comments are full of “Much wow, here’s some DOGE,” like sending “666” in China—just for fun!

The real boost came from Elon Musk, the “king of promotion.” He’s practically Dogecoin’s “wild ambassador,” tweeting daily that “Dogecoin is the future.” Changing his Twitter avatar to a Shiba Inu can send Dogecoin’s price soaring. He even joked about sending it to the moon, printing Shiba Inu logos on rockets! Fans went wild, rushing to buy in. From a few cents per coin, Dogecoin shot up to a high of $0.74, with a market cap over $70k—more valuable than many listed companies! But it has no supply cap; it issues 5B new coins annually, opposite to Bitcoin’s scarcity, making it a “money-printing machine” in the crypto world! Its price is like a roller coaster—Elon’s words can make it skyrocket, bad news can make it crash. Some make quick money, others chase high and get burned, crying “Never trust meme coins again!”

What’s more ridiculous? It has no core technological innovation—just “meme + celebrity effect” hype! But people love it—community spirit is incredible. Some say it’s “the source of happiness in crypto,” others call it “the biggest Ponzi scheme,” and the debate has gone on for over a decade.

Today, Dogecoin remains in the top ten by market cap. Despite wild price swings, its popularity hasn’t waned. This “meme Shiba Inu” has gone from a joke to a top-tier coin—one of the most surreal stories in crypto!

03 “The Presidential Air Token” — TRUMP Coin
In January 2025, Trump announced on social media: “I’m launching a coin!” The TRUMP cryptocurrency suddenly appeared, with the website claiming it’s the “only official Trump Meme Coin”—so the former president is now a crypto “influencer” instead of a politician?

Even more absurd, this coin has no real technology—completely relying on the “Trump IP” for hype. It’s a typical “air coin”: no underlying assets, no decentralization tech. 80% of the coins are held by Trump’s companies—like printing money and selling it himself. When 🔥 launched, the price skyrocketed from a few dollars to $75.35, a 500-fold increase, with a market cap hitting $4 billion, ranking fourth among Meme coins! Investors went crazy, trying to catch this “big fortune,” but within 24 hours, 176k people got margin called, losing nearly $500 million. Some lost over 40,000 RMB in just three hours—going from “financial freedom” to “cut losses” and crying in the bathroom.

This coin is essentially a Meme coin, driven by celebrity hype, with no real value backing. The issuer can print more at will—aiming to grow from 200 million to 1 billion coins over three years. Early investors’ funds are locked in, and latecomers are just “bagholders.”

In the end
You might think it’s “decentralized future currency,” but it’s really a “pump-and-dump tool controlled by manipulators.” You might believe it’s a “shortcut to wealth,” but it’s actually a “zero-sum game where most lose.” Blockchain, hash algorithms, public-private keys—sounds fancy, but at its core, it’s “a string of code + a bunch of crazy people.” Price increases are “luck,” drops are “normal”—don’t be fooled by promises of “easy passive income.” If you really want to get in, ask yourself: “Am I able to profit at others’ expense, or am I just waiting to be exploited?”