The period starting in December 2017 when Bitcoin closed at $19,140 only to drop down to $3,236 one year later. A very volatile asset, Bitcoin reached $67,566 in November 2021. Two months later, it dropped to $35,030 before it reversed course and began to climb.
Crypto investing, with Bitcoin being the bellwether, has been a roller coaster ride for many people. Many cryptocurrencies fluctuate with the same volatility as Bitcoin; however, "hodlers" believe valuations of their favorite coin will always continue to rise. See
hodling,
NFT winter and
crypto glossary.