Bittrex left the US market

Bittrex, a cryptocurrency exchange, announced that it would cease operations in the United States.
After nine years in business, Bittrex is exiting the US market, but says it will continue to operate in Europe, Latin America, and Canada.
As noted on the Bittrex website, the primary reason is stricter oversight of companies that provide services in the cryptocurrency market by US regulators.
"It's just not economically viable for us to continue to operate in the current U.S. regulatory and economic environment. Regulatory requirements are often unclear and enforced without appropriate discussion or input, resulting in an uneven competitive landscape," cryptocurrency platform head Richie Lai explains on his Twitter page.