Bitcoin is a highly volatile asset, and its price history can be divided into several bull and bear cycles. The halving events, which occur roughly every four years, are often seen as catalysts for these cycles, as they reduce the supply of new bitcoins entering the market. Here are the major bull and bear cycles in Bitcoin’s price history, along with their halving dates, prices, and percentage gains and losses:

1. The Early Years (2009-2011):
   • Bitcoin was created in 2009, and for the first two years of its existence, it traded at only a few cents per coin.
   • Halving Date: N/A
   • Price range: $0.001 – $31.91 (from Oct 2009 to June 2011)
   • Percentage Gain/Loss: Over 3,000,000% gain
2. The First Bull Run (2012-2013):
   • In early 2012, Bitcoin’s price started to climb rapidly, and it reached a peak of $266 in April 2013.
   • Halving Date: November 28, 2012
   • Price range: $12.35 – $266 (from Nov 2012 to April 2013)
   • Percentage Gain/Loss: Over 2,000% gain
3. The First Bear Market (2014-2015):
   • Following the 2013 peak, Bitcoin’s price entered a long bear market that lasted for over a year.
   • Halving Date: July 9, 2016
   • Price range: $160 – $1,242 (from Jan 2014 to Jan 2015)
   • Percentage Gain/Loss: Over 87% loss
4. The Second Bull Run (2016-2017):
   • Bitcoin’s price started to climb again in 2016, and it reached an all-time high of nearly $20,000 in December 2017.
   • Halving Date: July 9, 2016
   • Price range: $534 – $19,783 (from July 2016 to Dec 2017)
   • Percentage Gain/Loss: Over 3,600% gain
5. The Second Bear Market (2018-2019):
   • Following the 2017 peak, Bitcoin’s price entered another bear market that lasted for over a year.
   • Halving Date: May 11, 2020
   • Price range: $3,122 – $13,880 (from Dec 2018 to June 2019)
   • Percentage Gain/Loss: Over 78% loss
6. The Third Bull Run (2020-2021):
   • Bitcoin’s price started to climb again in 2020, and it reached a new all-time high of over $64,000 in April 2021.
   • Halving Date: May 11, 2020
   • Price range: $8,724 – $64,863 (from Nov 2020 to Apr 2021)
   • Percentage Gain/Loss: Over 640% gain

It’s worth noting that Bitcoin’s price is highly volatile, and these cycles can vary in length and intensity. Additionally, past performance is not a guarantee of future results, and investing in cryptocurrencies comes with a high degree of risk.