
USDT: one token, several chains
The same dollar-linked token exists on Tron, Ethereum and other networks. Picking the wrong one is the classic mistake.
Independent crypto explainers
Blockchain and cryptocurrency, taken apart one piece at a time: what a USDT transfer really does on Tron or Ethereum, why Bitcoin's supply schedule is fixed in code, and how to keep a wallet out of a scammer's reach. Written for reading on a phone, one screen at a time.
Protocol schedule: the subsidy halves every 210,000 blocks. Transaction fees are paid on top and are not shown.
Your device time: –
Crypto runs without a closing bell, yet prices often react when stock and currency markets open or shut. The status column is worked out in your browser from each venue's normal session; public holidays are ignored.
Most beginner losses come from not knowing what an asset is, which network it lives on or who is on the other end of a message. Start with these.

The same dollar-linked token exists on Tron, Ethereum and other networks. Picking the wrong one is the classic mistake.

Blocks, halvings, satoshis and the fixed supply, with the arithmetic shown.

Seed phrases, fake support agents, address poisoning and "recovery" offers.
A blockchain is a shared record that thousands of computers keep in sync. Nobody edits a balance directly. Instead, a wallet signs a message saying "move this amount from my address to that one", broadcasts it, and the network's validators or miners bundle it into a block. Once enough blocks sit on top, reversing it becomes impractical.
Three consequences follow, and they explain most of what can go wrong:
Our crypto guide for beginners walks through wallets, keys and exchanges in order, and the glossary defines every term used on this site.
| Network | Address starts | Fee paid in |
|---|---|---|
| Tron (TRC20) | T | TRX (energy and bandwidth) |
| Ethereum (ERC20) | 0x | ETH (gas) |
| Bitcoin | 1, 3 or bc1 | BTC |
Sender and receiver must use the same network. A matching token name is not enough.
Five questions worth answering before any money moves. None of them needs specialist knowledge, and together they filter out most expensive mistakes. Each links to the guide that covers it properly.
Each tool runs in your browser, stores nothing and prints its formula so you can check the result by hand.
Offshore platforms advertise leverage in the hundreds. Regulators in the UK and EU drew much lower lines for retail clients, and crypto sits at the very bottom of the scale because its prices swing so hard. Before using any borrowed exposure, read the margin calculator notes and our broker and exchange checklist.
Caps set by ESMA and the FCA for retail clients. The FCA does not allow crypto derivatives to be sold to UK retail consumers at all.
Most people underestimate how much two small fees take from a short trade. Enter a stake, an entry price, an exit price and the fee rate, and the calculator applies the fee on both legs. It is a planning tool only: it cannot see spreads, network fees or tax.
For the full list of costs, see trading fees explained.
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