Bitcoin is nothing like a FIAT currency that we use everyday.
It is decentralized, in other words, it is not controlled in supply or price by a reserve or central bank, therefore it does not recieve interest like FIAT. A central bank or mint cannot just make more Bitcoin like it prints FIAT currency and create inflation.
It is not kept in bank vaults and used for debt generation like FIAT currency, you cannot borrow Bitcoin from a bank or an exchange because it is not centralized.
Bitcoin is not open to exchange controls like FIAT currency, if you have Bitcoin and you want to send it overseas, you send it to the recievers wallet directly from yours to theirs, no intermediary like westernunion or forex services at your local bank.
Bitcoin cannot be deposited into a traditional bank and earn interest as a savings investment like you can with FIAT.
Bitcoins value is decided purely on supply and demand and what people think it is worth. Yes there are external forces that do affect its price, like a Bitcoin Whale (someone who owns millions of $ worth of Bitcoin, and then decides to offload a couple of million $ worth and kills the price), But it is not decided by central bankers.
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So, when you think about Bitcoin, do not compare it to FIAT and how it affects your life and enslaves you to a corrupt system. FIAT currency traps you into a debt cycle, it depreciates in value meaning that to you have to earn more each year to keep your life style up, but the truth is, you never keep it up as an employee relying on a salary as your salary depreciates through inflation every month, not even annually.
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People said that Bitcoin was dead and dying as it was dropping from the December 2017 highs. It reached $5000 and they said it was dead and gone, then it hit $4000, and people turned their backs on Bitcoin, then it hit $3200 and everyone said thats it, its dead, but as I type this Bitcoin is $12420, so if you think that bitcoin is gone and dead, think again or it will be too late.