What is a crypto wallet? A complete beginner's guide

If you are new to crypto, the first thing you need is a crypto wallet. Without one you can't receive USDT, send it, or keep it anywhere safe. This guide explains from scratch what a crypto wallet is, how it works, the main types, and how to choose one that is both simple and secure.

A crypto wallet in plain words

Despite the name, a crypto wallet doesn't hold coins "inside" it. Crypto always lives on a blockchain: a public ledger that thousands of computers keep a copy of. A wallet is a tool that manages two things:

• Public address: like an account number. You share it so people can send you funds. TRON addresses, for example, start with T.
• Private key: like your signature. Whoever has the private key of an address can move the funds in it, which is why it must never fall into anyone else's hands.

When you say "I have 100 USDT in my wallet", what you mean is that the blockchain records 100 USDT belonging to an address whose key your wallet controls.

How does a crypto wallet work?

Say you want to send 50 USDT to a friend. Behind the scenes:

1. You enter your friend's address and the amount.
2. The wallet builds a transaction and signs it with your private key. The signature proves ownership without revealing the key.
3. The signed transaction is broadcast to the network and validators include it in a block.
4. After a few confirmations the transaction is final and the balance shows up at your friend's address.

The network charges a fee for this, paid in the network's native coin: TRX on TRON, BNB on BNB Chain, ETH on Ethereum and SOL on Solana. We compare network fees in detail in Which network should you send USDT on?

Types of crypto wallets

1. Custodial vs non-custodial

The most important difference is who holds the private key.

• Non-custodial wallet: only you hold the key, usually as a 12- or 24-word "recovery phrase". You have full control, but if you lose those words, or someone sees them, nobody can get your funds back. Trust Wallet and MetaMask are well-known examples.
• Custodial wallet: the provider keeps the keys behind security controls and you sign in with email, password and two-factor authentication. Forget your password and the account can be recovered; there is no piece of paper to lose. In exchange, you have to trust the provider's security and honesty. Exchange wallets and TetWallet are in this group.

Neither is "better" in every case. See the full comparison in TetWallet vs Trust Wallet.

2. Hot vs cold

• Hot wallets are connected to the internet: mobile apps, browser extensions, web wallets, Telegram bots. Fast and convenient for daily use.
• Cold wallets are kept offline, like hardware wallets. Safer for large, long-term holdings.

Serious custodial services combine both: a small hot wallet to pay withdrawals quickly and most funds in cold storage. TetWallet works this way.

3. By form

• Mobile app: the most common form.
• Browser extension: for DeFi and NFT sites.
• Web wallet and PWA: runs in the browser and can be installed to your home screen without an app store. See Download.
• Telegram bot: a wallet inside Telegram. More in Crypto wallets in Telegram.
• Hardware wallet: a USB-like device that keeps keys offline.

Single-coin or multi-coin?

Most people today need several networks: USDT on TRON for everyday transfers, BNB Chain for low fees, Ethereum where only ERC20 is accepted, and Solana for speed. A multi-coin wallet puts all of these in one place and gives you a separate address on each network.

Important: USDT is one asset that exists on several networks. USDT on TRC20 and USDT on BEP20 are both USDT, but sending on the wrong network can lose your funds for good. Sender and receiver must always use the same network.

What makes a good wallet?

A longer checklist is in the best crypto wallet: 10 criteria. In short:

• Layered security: two-factor authentication on withdrawals, new-device sign-in alerts, most funds in cold storage.
• The networks you need: at least TRC20 and BEP20 for USDT.
• Scam protection: for example detection of fake USDT.
• Transparent fees: the exact fee shown before you confirm.
• Real support in your language.
• A clear recovery path if you lose your phone or password.

First steps after creating a wallet

1. Turn on two-factor authentication. Google Authenticator is the best option. See What is 2FA?
2. Get your deposit address right. Pick the network first, then copy the address. Details in What is a USDT wallet address?
3. Test with a small amount the first time you send to a new address.
4. Read the basics of security: 12 crypto wallet security tips.

What kind of wallet is TetWallet?

TetWallet is a custodial, multi-network wallet that works on the web, as an installable app (PWA) and in the Telegram bot @tetwalletbot, all on one account:

• A dedicated address on each network: USDT on TRC20, BEP20, ERC20 and Solana, plus TRX, BNB, ETH and SOL.
• A separate balance for each asset, with its USD value.
• Withdrawals only with two-factor authentication (Google Authenticator or an email code).
• Multi-step deposit checks that reject fake USDT.
• Most funds in cold storage, an anti-phishing code in emails and alerts for new-device sign-ins.

Frequently asked questions

Does creating a crypto wallet cost anything?

Creating most wallets, TetWallet included, is free. You only pay network fees when you send or withdraw.

How is a wallet different from an exchange account?

An exchange is for buying and selling, and its wallet is usually custodial. A standalone wallet is for holding, receiving and sending. Many people buy on an exchange and keep funds in a separate wallet.

If I lose my phone, are my funds gone?

With a non-custodial wallet, only your recovery phrase can bring them back. With a custodial wallet like TetWallet, you recover the account through your email and the recovery process.

Is one address enough for every coin?

No. Each network has its own address. BEP20 and ERC20 addresses look the same, but they are different networks and must be chosen correctly.