Bitcoin(₿) or BTC is a cryptocurrency invented in 2008 by an unknown person or group of people using the name Satoshi Nakamoto. https://www.economist.com/the-economist-explains/2015/11/02/who-is-satoshi-nakamoto. Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services, but the real-world value of the coins is extremely volatile. https://markets.businessinsider.com/currencies/news/bitcoin-limited-real-use-volatility-speculative-bubble-ubs-wealth-management-2021-3-1030250731
Mining Bitcoins is an “all or nothing” affair — miners receive either 6.25 BTC in 10 minutes or 0. Mining is structured as a race between miners, who compete to solve computationally intensive puzzles and become the first on the network to successfully validate a new block and pocket the reward. https://coinmarketcap.com/alexandria/article/how-long-does-it-take-to-mine-one-bitcoin
So it’s important to understand that the entire Bitcoin mining network is essentially competing in this block discovery process. Although it takes 10 minutes to discover each block and each block yields a 6.25 BTC reward for the miner that successfully discovered it, only a single miner in the entire mining network will actually successfully discover the block—and since there are potentially tens of thousands of Bitcoin miners in operation, the odds of single-handedly discovering a block is quite low. For this reason, the vast majority of Bitcoin miners work together as part of a mining pool, combining their hash rate to stand a better chance of discovering a block. Then, regardless of which miner in the pool actually discovers the block, the rewards are distributed evenly throughout the pool. https://decrypt.co/35373/how-long-does-it-take-to-mine-a-bitcoin
So it’s almost impossible to tell, how long does it take to mine 1 bitcoin. If you own all of the mining rigs in the world, then it would take 10 minutes if you try to mine 1 bitcoin with your simple PC, it would take hundreds of years.