Bitcoin took a brutal fall on Monday, briefly dipping below $30,000 for the first time since July 2021. The world’s largest cryptocurrency is now worth less than half of what it was in the fall. Other cryptocurrencies, like Ether and BNB, have seen similar falls, while trading volumes have also tapered off on major exchanges. Some experts are now warning of a “crypto winter,” in which the sector’s astonishing growth is replaced by an extended period of contraction.