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What is self-custody in crypto? Keys, wallets and the risks

Self-custody means holding your own crypto keys instead of an exchange. It removes the risk of a platform failing, which no insurance covers, and hands you the full job of guarding the keys. Here is how it works and where it goes wrong.

8 min read
Regulation & policy

CFTC clears stock perpetual futures, a crypto staple, for US trading

The CFTC cleared a legal path on November 3 for perpetual futures on individual stocks to trade on US exchanges for the first time. It extends a product built in crypto markets, and already faces a lawsuit and objections over how it should be classified.

5 min read
Learn

What is a UTXO? How Bitcoin tracks coins without accounts

A UTXO is an unspent piece of bitcoin your keys can spend. Bitcoin keeps no account balances, so your wallet adds up its UTXOs to show a total. Here is how the model works, why it sets your fee, and how it differs from Ethereum.

5 min read

More top stories

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  1. DeFi & protocols

    XRP Ledger set to fix flaw that let burn rights mint new tokens

    5 min read
  2. Learn

    How to revoke token approvals before a wallet drainer strikes

    7 min read
  3. Markets

    DTCC launches tokenized securities service with 20 Wall Street firms

    6 min read
  4. Business

    Tether reports $1.5 billion Q3 profit, reserve buffer near $8 billion

    5 min read

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Learn / explainers

All news →
  1. Learn

    What is self-custody in crypto? Keys, wallets and the risks

    8 min read
  2. Learn

    What is a UTXO? How Bitcoin tracks coins without accounts

    5 min read
  3. Learn

    How to revoke token approvals before a wallet drainer strikes

    7 min read
  4. Learn

    What is a gas fee, and why is most of it destroyed rather than paid to anyone?

    8 min read

Bitcoin

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BTCPay Server tells users to shut down after hot wallet drains

BTCPay Server, the free bitcoin payment tool, told operators to switch off their servers on November 1 after reports that attackers swept funds from internet-connected hot wallets. The project says only older versions were hit, and has not named a loss figure.

5 min read

Can quantum computers break Bitcoin? What the math says

A powerful enough quantum computer could forge Bitcoin signatures in theory. No such machine exists, and the distance between today's 105-qubit chips and the millions an attack would need is still vast. Here is what is real, what is years away, and what Bitcoin is already doing about it.

6 min read

Business

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Mercado Bitcoin halts withdrawals after $40 million outflow

Brazil's largest crypto exchange froze deposits and withdrawals on 2 November after attackers moved funds from its wallets. Security firm Hypernative estimated more than $40 million left across at least 10 chains. Mercado Bitcoin says it contained the breach and that no customer funds were harmed.

5 min read

DeFi & protocols

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Hackers hijack a dozen DeFi websites via Name.com domains

Attackers hijacked the domains of about a dozen DeFi sites registered with Name.com late on October 30, pointing visitors to fake pages that drained their wallets. No smart contract was breached. Early estimates of the theft run from about $138,000 to $202,386.

5 min read

Markets

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DTCC launches tokenized securities service with 20 Wall Street firms

The Depository Trust Company switched on its Tokenization Service on October 28, letting 20 firms including JPMorgan and Citi mint on-chain versions of US stocks, ETFs and Treasuries. On-chain settlement and collateral use are still a 2027 plan.

6 min read