A Bitcoin halvening — there have been two since Bitcoin's creation in 2009 — is a fixed event and will occur after every 210,000 blocks are mined, or confirmed, by the system.
Some 12 months after the first Bitcoin halving event in November 2012, the Bitcoin price reached what was then an all-time high of $1,000.
The 2016 halvening heralded last year's bull run which peaked in December 2017 with the Bitcoin price reaching an eye-watering $19,000.
Since then it's fallen sharply back — but the same happened after the 2012 halvening and subsequent boom, with the Bitcoin price falling as low as $200 per coin before picking up in the lead up to the 2016 halvening.
