What is cryptocurrency?
DefinitionCryptocurrency is digital money that lives on a blockchain instead of in a bank account. Ownership is proven with cryptographic keys, so whoever holds the private key can spend the coins without asking a bank or company for permission.
How cryptocurrency works
Cryptocurrency works through a public ledger and a pair of keys. The blockchain records every balance and transfer, your public address is where you receive funds, and your private key signs each payment to prove it came from you.
Nobody can spend your coins without that signature, and once a transaction is confirmed it cannot be reversed. That is what makes crypto both powerful and unforgiving: there is no chargeback and no password reset.
Main types of cryptocurrency
Cryptocurrencies fall into a few broad groups, and the difference matters when you send or hold them:
- Native coins such as Bitcoin (BTC), ether (ETH), Toncoin (TON) and TRX, which pay the fees on their own blockchains
- Tokens created by smart contracts on top of a blockchain, such as USDT on Tron or on TON
- Stablecoins, tokens designed to track a currency such as the US dollar
- Tokenized assets, such as gold tokens backed by physical gold
Risks to understand before you buy
The main risk of cryptocurrency is price volatility: most coins can rise or fall sharply in a single day, so only use money you can afford to keep in crypto. Stablecoins move far less, but they depend on their issuer’s reserves.
Other risks are practical. Payments sent to the wrong address or network are usually lost, scammers pose as support staff or investment advisers, and anyone who sees your recovery phrase can empty your wallet.
Where to keep cryptocurrency
You can keep crypto with a company, such as an exchange account, or in a self-custody wallet where you hold the keys. With a company, you trust it to stay solvent and let you withdraw; with self-custody, you take responsibility for your recovery phrase.
Waletifi is a self-custody wallet: your keys stay on your phone, and every balance is shown in your local currency with the exact crypto amount beside it.
