Over 80% of Bitcoin has been mined

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As of January, 13, 2018, 80% of all Bitcoins that will ever exist have been mined. The next halving is a little over two years away, at which point inflation will fall to 2%.

Under the assumption that halvings will occur every four years, the final block that creates new bitcoins would occur in 2140.

The “halving” occurring with block 6,930,000 would then push the reward below 1 satoshi, thus no block reward would be paid out anymore.

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You can find a table with the respective calculations here: Bitcoin Reward Schedule

Really, the mining reward might be too little to pay for mining efforts much earlier: already in 2036 99% of the bitcoins will be in circulation, in 2048 it will be 99.9%.