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Bitcoin is often called "digital gold," but after all the talk, many people still can't figure out what it really is or why it's worth $65,000 each. Today, I'm not talking about the market or urging you to buy; instead, let's quietly break down the underlying logic and see: what it is, where does scarcity come from, and whether its value can truly stand. --- 1. Essentially, it is a "public ledger shared by the whole world" Don't let the word "coin" misinterpret you. Bitcoin's true core is a public ledger stored on thousands of computers worldwide. Who transferred how much money to whom is recorded, and every participating computer has an identical complete backup. In traditional finance, the ledger is managed by the bank—whatever the bank says you have, that's what it is. Bitcoin doesn't have this 'center'; the right to record accounts is handed over to all network nodes, and a transfer must be verified by most nodes to be truly credited. Transactions are packaged into 'blocks' by chronological order, and the blocks are connected into 'chains'—this is blockchain. Its hardest core is that no institution can secretly tamper, reissue, or freeze your assets—because to alter it, you have to simultaneously alter the vast majority of copies worldwide, which is so costly it's almost impossible. --- 2. Scarcity is not a story, but dead code The biggest weakness of fiat currency is its unlimited issuance—the more you print, the weaker the purchasing power. Bitcoin does the opposite, with a total supply fixed at 21 million from the start—no more, no less. This rule is engraved in the underlying protocol, protected by consensus across the entire network, and no one can change it. What's even more interesting is the timing of new coin releases. The new Bitcoin is a reward for "bookkeepers," and this reward is halved roughly every four years: In 2009, each block was rewarded with 50 coins, later changed to 25, 12.5, 6.25, dropped to 3.125 coins by April 2024, and is expected to be cut further to 1.5625 coins in 2028. New coin output is slowing down, with the last coin expected to be mined around 2140. So far, about 20.06 million coins (about 96%) have been mined out of the total 21 million units, with the remaining 4% gradually released over more than a century—this "fast early, slow later" design makes scarcity visible to the naked eye. --- 3. No boss, no headquarters—who really manages it? This is where beginners get confused the most—how can something without a CEO, office, or customer service keep running? It is maintained by countless mining machines and full nodes worldwide. Miners compete for bookkeeping rights through calculation; whoever first calculates a valid answer has the right to package the latest transaction into blocks and receive the system's reward of new coins. This process is called "mining." So why are these people willing to work obediently? Because the rules are designed as "honesty is the most cost-effective": to destroy or tamper with ledgers, one must control more than half of the network's computing power, which is suffocatingly costly; and even if they succeed, the token price will inevitably collapse, and their huge investment will be wasted. Therefore, everyone's profit-seeking behavior ultimately unites into a force maintaining system stability — this rule is called the "consensus mechanism." --- 4. Where does the value come from? Supply locked in + real demand The price of any asset ultimately depends on supply and demand. · Supply side: total supply is 21 million hard caps, new additions are slowing down, which is a mathematical scarcity. · Demand side: The demand over the years has truly grown— · It can be freely transferred worldwide, without banks or borders; · As long as private keys are properly managed, no government can directly freeze or confiscate them; · More and more people treat it as "digital gold" to hedge against the risk of fiat currency depreciation; · In the past two years, spot Bitcoin ETFs have been approved, allowing institutions and ordinary investors to participate like buying and selling stocks, bringing in another wave of new capital. Scarcity is the foundation, demand is the building; the combination of the two supports the current total market value of about $1.3 trillion. --- 5. Three iron rules every beginner must engrave in their minds · First, extremely volatile fluctuations. Daily fluctuations of 5%-10% are commonplace; historically, prices have been halved or even dropped by 70% from their peaks. Don't treat them as a stable financial tool. · Second, the private key is sovereignty. Whoever holds the private key truly owns the coin; If the private key is lost, stolen, or scammed, no customer service can help you recover it, which is completely different from reporting a loss at the bank. · Third, only use spare cash. It's one of the most aggressive assets of this era; the size of your position directly determines the quality of your sleep each night. Never bet on living expenses or emergency money. --- The first lesson in understanding Bitcoin isn't guessing how much it can rise, but figuring out what it is, how scarcity is realized, and what its value relies on. Once you build a solid foundation, then look at those dramatic ups and downs, you'll naturally have a scale in your heart, rather than being led by emotion. $BTC The above is purely personal learning and sharing and does not constitute any investment advice.

]SK Hynix to Build Semiconductor Factory in Japan According to informed sources, SK Hynix is advancing an investment worth hundreds of trillions of Korean won to build a memory semiconductor manufacturing plant (wafer fab) in Miyagi Prefecture, northeastern Japan. If realized, this will mark the first time a South Korean semiconductor company establishes a local manufacturing base in Japan. However, as the Japanese investment plan takes shape, pressure from the U.S. on South Korean companies to expand domestic memory chip production in the U.S. is expected to intensify, further complicating future investment allocation decisions. According to the Hankook Ilbo report on the 20th, SK Hynix is pushing forward with building a memory semiconductor wafer fab in Miyagi Prefecture in the northeastern region of Honshu Island, Japan. A business insider stated, "I understand that SK Group Chairman Chey Tae-won recently personally visited the area." Miyagi Prefecture is one of three regions, alongside Kyushu and Hokkaido, that the Japanese government hopes to develop as major semiconductor industry hubs. The investment is expected to reach hundreds of trillions of Korean won. Compared to the domestic semiconductor clusters in Suwon, Yongin, and Gyeongnam with investment scales of hundreds of trillions of won, the Japanese factory will be a relatively smaller production base. The Miyagi wafer fab will serve as a supplementary overseas manufacturing base, while SK Hynix will continue to advance domestic investments in the Yongin and Gyeongnam semiconductor clusters as originally planned. This move appears aimed at actively expanding production capacity to address the ongoing global memory chip supply shortage. If the plan is realized, SK Hynix will become the third foreign semiconductor company to operate semiconductor manufacturing facilities in Japan, following U.S.-based Micron and Taiwan's TSMC. Samsung Electronics currently operates only an advanced semiconductor packaging research center in Yokohama. However, this investment also carries risks. The U.S. has been pressuring the South Korean government and companies to invest in building memory wafer fabs on U.S. soil. If SK Hynix proceeds with the Japanese investment, Washington may increase demands for additional domestic production capacity in the U.S. Furthermore, the company must contend with domestic political uncertainties in South Korea and public sensitivity regarding investment in Japan in the strategically important semiconductor industry.