Bittrex, established in 2014, is a digital asset exchange in the United States. It is called ""B-net"" by Chinese users (I don't know whether Big B has any shares in it). It provides currency and DOLLAR OTC transactions.
The Bitterex team, whose members are from Microsoft, Amazon, Qualys and blackberry, have extensive transactional service experience (but probably not as long as 50 years).

Bittrex

https://bittrex.com/

Google Play：
<a href="https://play.google.com/store/apps/details?id=com.bittrex.trade" target="_blank" rel="noopener">https://play.google.com/store/apps/details?id=com.bittrex.trade</a>

<a style="background-color: #f0f2f5;" href="https://twitter.com/bittrexexchange" target="_blank" rel="noopener">Twitter</a>，<a style="background-color: #f0f2f5;" href="https://facebook.com/bittrex" target="_blank" rel="noopener">Facebook</a>

<a href="https://international.bittrex.com/Fees" target="_blank" rel="noopener">https://international.bittrex.com/Fees</a>