Swapping Bitcoin for USDT
Bitcoin is the slowest and dearest thing to move here. Both facts belong to Bitcoin rather than to the route. A block lands about every ten minutes and the fee to be in it is auctioned, so the wait and the cost are decided by everyone else sending at the same time as you.
0.01 BTC 
USDT Why the fee is not a number anyone can print
Bitcoin runs a market for block space. A quiet Sunday and a busy Tuesday differ by an order of magnitude, which is why exchanges batch their withdrawals and why any page quoting a fixed Bitcoin fee is quoting an average rather than a price. The figure here is priced when you ask and holds while you decide.
Ten minutes is an average, not a promise
Blocks arrive on a Poisson schedule: the gap between two of them averages ten minutes and can be two or forty. A transfer that has not confirmed in twelve minutes is not stuck, it is waiting its turn, and there is no priority queue to join afterwards.
Which dollars you get
The USDT that arrives is a credit on whichever chain you chose to receive on, and those are not interchangeable: Tron’s and BNB Chain’s are separate balances that happen to be worth the same. Pick the one whoever you are paying next can accept, not the one that sounds familiar.
The whole balance can go
The network fee is settled inside the operation rather than deducted separately, so nothing has to stay behind to pay for the send. There is no dust remainder left at an address that is too small to be worth moving later.
What you are actually doing
This is an exchange, not a transfer between two forms of the same money. You are giving up an asset that moves and taking one that does not, at the price of the moment you sign. That is the point when the swap is deliberate and the risk when it is a reflex.
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Several wallets in one account, unlinked on-chain
Hold as many wallets as you need inside one Telegram account. Their addresses are not linked on-chain, so paying from one tells nobody about the others. Send to a @username or to any address.
Questions
How long does a Bitcoin swap take?
A block lands about every ten minutes on average, and the gap is irregular by design. The wallet shows what arrives before you sign.
Why does the cost change between quotes?
Bitcoin auctions its block space, so the fee is whatever the market clears at. The price you are quoted is the real one for that moment.
Can I swap my whole Bitcoin balance?
Yes. The fee comes out of the operation, so no remainder has to stay behind.