When did Poloniex shut down?

I'm sorry, I'm not quite sure about the specific timing of Poloniex's shutdown. Cryptocurrency exchanges, like any other business, can face various challenges and decisions that may lead to closures. However, it's important to note that such closures don't necessarily mean the end of cryptocurrency trading or investment opportunities. In fact, new exchanges and platforms often emerge to replace those that have closed. It's always advisable to stay updated with the latest news and developments in the cryptocurrency industry to make informed decisions about your investments. If you're interested in learning more about the state of Poloniex or other cryptocurrency exchanges, I suggest checking reliable sources of information such as news websites, blogs, or forums dedicated to the crypto industry. These resources often provide detailed analysis and updates on the latest happenings in the world of cryptocurrencies.