Qortal’s Trade Portal is a COMPLETELY CROSS-CHAIN trading system, wherein the user only talks to their local computer to execute a trade that takes place DIRECTLY from one blockchain to another.
As of version 1.3.9 core and 1.3.2 UI we are preparing to remove the BTC Trade Portal, and replace it with LTC Trade Portal, and a multi-wallet in the UI for BTC, LTC, and QORT.
We will likely bring back the BTC market at a later date, but for now BTC is simply too slow and clunky, so LTC is a better choice for faster, cheaper (cheaper than centralized exchange, only requiring the fees of the networks involved in the trade) market for Qortal Users.
Until the lightning network is possible on BTC, LTC is simply a better network to trade with, using a cross-chain trade.
See the infographic below on the steps and methodology utilized in the trade portal.