How many failed crypto exchanges were there in 2018-2022?
As a keen observer of the cryptocurrency market, I'm particularly interested in understanding the resilience and stability of various crypto exchanges. Given the volatile nature of digital currencies, it's crucial to assess the number of crypto exchanges that have failed in recent years. Could you please elaborate on the number of failed crypto exchanges in the time period from 2018 to 2022? Understanding this figure could provide valuable insights into the challenges and risks facing crypto platforms today. Thank you for your assistance in addressing this question.