After the first Bitcoin halving in November 2012, something big happened: the block reward for miners got cut in half! That change from 50 BTC to 25 BTC started a slow but steady rise in Bitcoin's price.

Within a year, its value shot up from around $12 to roughly $1,100 by the end of 2013. People were talking about it more, more folks were using it, and there were fewer new bitcoins around because of the halving. All these things together seemed to push the price up, but of course, the market's always a bit unpredictable!
What Is Bitcoin Halving?
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Bitcoin Halving: Why It Matters & What To Expect
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Bitcoin Halving: Why It Matters & What To Expect

Bitcoin Halving is an event that occurs every four years in the Bitcoin network. It refers to the reduction of the block reward that Bitcoin miners receive for adding new blocks to the blockchain.