Ep 01 Key Takeaways: What's Really Backing Your Stablecoin? USDT, USDC vs BTCD
What makes a stablecoin worth 1 dollar? The answer isn't in the coin itself — it's in the reserves behind it. This episode answers one question: what's actually behind USDT, USDC, and BTCD?
In everyday use, a stablecoin works like a "digital dollar" — transfers, savings, and trading all depend on it. But behind the same 1 dollar, different stablecoins hold completely different things. Until you understand the reserves, you don't really understand what you're holding.
This is the first episode of the series, and it starts with the most basic question: where is a stablecoin's value anchored? Later episodes go on to freezing, depegging, and other specifics.
1. Centralized stablecoins: how USDT and USDC hold their reserves
USDT and USDC are issued by companies. Every coin you hold corresponds to a reserve asset on the issuer's books. The coin holds 1 dollar because of that reserve — in theory, you can redeem your coins with the issuer for 1 dollar at any time, and the redemption is backed by the reserves on the books.
But there are three key points most people don't think about:
- Where the reserves sit and who manages them is the issuer's call. The makeup and management of the reserves are decided by the issuer. Users can't verify them in real time or take part in managing them — they can only trust what the company discloses.
- The issuer holds the freeze key. If the issuer decides to freeze an address, the coins in that address can't move. Whether your coins work doesn't just depend on you — it depends on the issuer.
- The yield on the reserves goes to the issuing company. The income generated by the reserve assets is taken by the issuer; coin holders get none of it.
Put differently: what you think is a dollar is actually an IOU from the issuing company — and whether that IOU is worth anything depends on the company's reserves and credit.
If something goes wrong with the reserves, or the market loses confidence in them, the price can fall below 1 dollar. That's a depeg.
So the centralized model is essentially "trust the issuing company": trust that it holds enough reserves, trust that it won't abuse the freeze key. The whole 1-dollar anchor rests on the company's credit and reserves.
2. BTCD's reserves: decentralized, backed by Bitcoin collateral
BTCD takes a different route: a decentralized stablecoin, backed by Bitcoin as reserve, created through collateralized minting. Simply put, you lock up Bitcoin and mint BTCD against it under the protocol's rules; the assets you lock up are what backs the BTCD you mint.
- Collateralized minting at 40% + 25%. With Bitcoin as collateral, you can mint BTCD worth 40% of its value; with FIST or ELA as additional collateral, you can mint another 25% — up to 65% in total. What you mint is always less than what you lock up; the difference is the safety cushion.
- Annual interest rate of 7%, of which 1% is an options hedging fee. That 1% is used to hedge price swings — an insurance layer built into the mechanism.
- Liquidation is generally not triggered. The mechanism has a liquidation line, but thanks to the options hedge, liquidation is not triggered under normal conditions.
- No single company can freeze your coins on its own. The reserves are on-chain, and anyone can verify them; the rules are written on-chain, not in some company's internal policy. You don't need to trust a company — you only need to verify whether the on-chain rules are being followed.
3. The key differences, side by side
| USDT / USDC (centralized) | BTCD (decentralized) | |
|---|---|---|
| What the reserves are | Reserve assets held by the issuing company | Bitcoin and other crypto assets as collateral |
| Who decides | The issuing company | On-chain rules |
| Freeze power | The issuer can freeze specific addresses | No centralized freeze power |
| Transparency | Relies on company disclosure; users can't verify in real time | Reserves are on-chain and publicly verifiable |
In one sentence: whether a stablecoin is worth 1 dollar depends on the reserves behind it — what they are, who's in charge, whether they can be frozen, and how transparent they are. Once you work through those four questions, the difference between centralized and decentralized becomes clear.
Next time someone asks you "what's the difference between USDT, USDC, and BTCD," don't start with the technology — start with those four questions. Different backing means a different object of trust.
4. Watch the full episode
This post is only a summary. The full reasoning, chapter breakdown, and side-by-side details are in the video. It has four chapters: Chapter 1 explains what reserves are, Chapter 2 covers USDT and USDC's reserves, Chapter 3 covers BTCD's reserves, and Chapter 4 compares the two routes and sums up. Jump to the chapter you want to dig into.
📺 Ep 01 full episode (Chinese): https://youtu.be/3hak9qpLUhM
📺 Ep 01 full episode (English): https://youtu.be/XAUcc8BDhSg
⚠️ This post is for information and education only and is not investment advice. Stablecoins can lose their peg; crypto assets are volatile. Please do your own research and decide carefully.
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