Can a US citizen use Poloniex?

I understand that Poloniex is a popular cryptocurrency exchange platform, but I'm curious about its accessibility for US citizens. Given the complex and ever-evolving regulatory landscape surrounding cryptocurrencies in the United States, I'm wondering if US citizens are able to use Poloniex to buy, sell, and trade digital assets. Are there any restrictions or limitations that US-based users should be aware of? Additionally, are there any alternative platforms that US citizens can consider if Poloniex is not an option for them?