How to deposit bitcoin to an exchange: the short version
Whoever asks "How to deposit bitcoin to an exchange?" is really asking what a coin costs and how long it takes to move. USDT transfer fees come in two layers: the network fee, paid in the coin of the network the transfer uses, and any withdrawal charge an exchange adds on top. On TRON the fee is covered by energy and bandwidth or by burning TRX, on BNB Smart Chain it is paid in BNB and on Ethereum in ETH gas. The cheapest way to send USDT is usually the network both sides support with the lowest total charge at the time.
How to deposit bitcoin to an exchange starts on its deposit page: choose bitcoin and the network, copy the address shown for the account, send from the wallet on that same network and wait for the confirmations the exchange requires. How to withdraw USDT from an exchange needs more care, because a mistake moves the coins out for good. Paste the receiving address, pick the network the receiver actually supports, read the withdrawal fee and confirm with the two factor code. A small first withdrawal to any new address limits the cost of an error.
How to sell USDT for cash usually follows one of two routes. On a regulated exchange, the seller deposits USDT on a network its deposit page lists, sells on the market and withdraws the money to a bank account, after reading the fees and withdrawal limits. Selling to another person through the marketplace of an exchange keeps the coins in escrow until the seller releases them. A seller releases nothing before the money shows in the bank account itself, since screenshots of payments are easy to fake, and payments from third parties can get a bank account frozen.
Common doubts
When should a seller release USDT to a buyer?
Only once the money shows in the bank account itself; screenshots and messages claiming payment are easy to fake.
Why match the USDT contract address before a swap?
Anyone can create a token with the same name and symbol, so only the contract address from official sources identifies the real one.
What is slippage in a BNB to USDT swap?
The gap between the quoted price and the price actually filled, which can grow on a decentralised exchange when the market moves.
How does replace by fee help a stuck bitcoin transaction?
A wallet that supports it can rebroadcast the payment with a higher fee, while a brand new separate payment risks paying twice.
Where does an exchange show its withdrawal charge?
On the withdrawal screen, before the transfer is confirmed, next to the network chosen; reading it there avoids surprises.