Just by reviewing Bitcoin's history, it's crazy to see how 2015 unfolded. After the disaster of 2014 where BTC lost 56%, the year 2015 completely changed the game with a 40% increase. The price of Bitcoin in 2015 fluctuated between $170 in January and over $460 in December — a real roller coaster. Key moments: the lightning crash in August that brought the price down to $214, then the gradual recovery in the fall. Interesting to note how Bitcoin's price in 2015 was influenced by events like the Greek crisis (June-July) or the increase in trading volume from China. By November, analysts were already talking about $600 for 2016. It's crazy to see how Bitcoin's price in 2015 marked a turning point after the previous dark year. Blockchain fundamentals were starting to attract mainstream attention at that time.