Yes, you can trade any token in USDT pair, excluding BTC/USDT. This is because BTC/USDT is a special pair that is not available on all exchanges, and is often used for arbitrage trading. However, all other tokens can be traded in USDT pair, as USDT is a stablecoin that is widely accepted on most exchanges. This allows traders to easily switch between different tokens without having to worry about the volatility of the underlying asset.