Why did Bittrex shut down?

Could you please explain why Bittrex decided to shut down? As a professional in the field of cryptocurrency and finance, I'm sure you have a thorough understanding of the situation. Was it due to a lack of liquidity, regulatory pressure, or some other factors? Was there a specific event or series of events that led to this decision? I'm curious to hear your professional opinion on this matter and what impact this closure may have had on the cryptocurrency community and the overall finance industry.