A Brief History of Losing Other People's Money
In February 2014, Mt. Gox — the largest Bitcoin exchange in the world — filed for bankruptcy after losing 850,000 BTC belonging to its customers. That was roughly $450 million at the time. At today's prices, it would be worth tens of billions.
In November 2022, FTX collapsed overnight. Over $8 billion in customer funds vanished. The exchange that ran Super Bowl ads and had its name on a basketball arena turned out to be using customer deposits to fund risky bets at a sister company.
These are not edge cases. They are the two most famous examples of a pattern that repeats every market cycle: centralized exchanges fail, and customers lose everything they stored there.
What Is Self-Custody?
Self-custody means you hold your own private keys. Your crypto lives in a wallet you control — a hardware wallet like Ledger or Trezor, a software wallet like MetaMask or Phantom, or even a paper wallet.
When you self-custody, no exchange, company, or third party can freeze, seize, or lose your funds. The tradeoff is responsibility: if you lose your seed phrase, nobody can recover it for you.
The Case for Self-Custody in 2026
The argument for self-custody has only gotten stronger:
The Tracking Problem
Self-custody introduces a new challenge: visibility. When your assets sat on Coinbase, you had a nice dashboard showing your balance. When you move to self-custody across multiple wallets and chains, that dashboard disappears.
Suddenly you need to:
This is where many people get stuck. They know self-custody is the right move, but they miss the convenience of seeing everything in one place.
Tracking Without Compromising Security
The key insight is that tracking and custody are separate concerns. You do not need to give anyone your private keys to see your portfolio. Public addresses are, by definition, public. Anyone can look up any address on a block explorer.
A good portfolio tracker uses only public addresses to read your on-chain data. It never asks for:
Folio works exactly this way. Paste your public address, and Folio reads your balances across 16 blockchains. It is the equivalent of checking a block explorer, but for every chain at once with price data and PnL calculations included.
How to Set Up Self-Custody Tracking
Step 1: Identify All Your Wallets
List every wallet you use. Hardware wallets, browser extensions, mobile wallets. Write down the public address for each one.
Step 2: Add Them to Folio
Paste each public address into Folio. The tracker will scan all supported chains for each address and aggregate the results.
Step 3: Review Your Complete Portfolio
For the first time, you will see everything you own in one view — without having connected a single wallet or shared a single key.
Step 4: Set Up Monitoring
Configure price alerts and portfolio notifications. Stay informed about your holdings without constantly checking.
The Best of Both Worlds
Self-custody gives you security and sovereignty. A read-only tracker gives you visibility and convenience. Together, they solve the problem that has plagued crypto holders since the beginning: how to truly own your assets while still knowing what they are worth.
You do not have to choose between security and usability. You can have both.
What About Exchange Holdings?
If you still keep some funds on exchanges (for trading, for example), you can track those too. Simply use the deposit address the exchange provides for each asset. Folio will read the on-chain balance just like any other wallet.
For assets that are not on-chain (sitting in an exchange's internal ledger), you will need to rely on the exchange's own interface. But this is a good reminder to move long-term holdings to self-custody.
Start tracking with Folio — it's free.