Navigating the world of cryptocurrency can feel overwhelming, especially when you're just starting out. But if you're based in Hong Kong and want to buy or sell Bitcoin (BTC) or Tether (USDT), the process is simpler than you might think—especially with the right platform and guidance. This comprehensive guide walks you through everything from account setup to trading strategies, ensuring a secure and efficient experience.
Understanding OTC Trading: A Safe Way to Trade Crypto
Over-the-counter (OTC) trading allows users to directly buy and sell digital assets peer-to-peer while relying on a trusted platform to mediate disputes. On AAX, this system ensures safety: if a buyer claims they’ve paid but the seller hasn’t received funds, the seller can file an appeal with evidence (like bank transaction records). AAX reviews both sides and resolves the issue within 24 hours.
All OTC merchants on AAX go through a strict verification process, minimizing risks and boosting user confidence.
Requirements for Using OTC on AAX
Before you can trade, make sure you meet these conditions:
- Complete KYC Level 1 verification to buy crypto. To sell, you must have either transferred crypto from an external wallet or previously purchased via OTC.
- Set a payment password in your account’s security settings.
- Add your preferred payment method—using Hong Kong’s Fast Payment System (FPS) is highly recommended for instant transfers.
- Ensure real-name matching: The name on your bank account must match your verified AAX account. Mismatches will result in rejected transactions.
Step-by-Step: Buying and Selling Crypto via OTC
- Go to the OTC Trading section and browse available offers based on price, quantity, and payment method.
- Select a seller (for buying) or buyer (for selling), then click “Buy” or “Sell.” No fees apply.
- Follow the counterparty’s payment instructions. After transferring funds, click “I have paid.”
- Wait for the merchant to confirm receipt. Once confirmed, the crypto is released to your wallet.
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It's that simple. If the price isn’t right, you can cancel—up to five times per day. Beyond that, trading is temporarily disabled. If a merchant doesn’t respond in time, use the appeal function and provide clear evidence (e.g., payment confirmation) to support your case.
How to Register on AAX: Quick & Easy Setup
Opening an AAX account takes just minutes. Here’s what you’ll need:
- A device with internet access (PC, iOS, or Android)
- Email address or phone number for verification
- Government-issued ID (passport or Hong Kong ID card)
- Proof of address (bank statement, utility bill, or official document issued within the last six months)
While Hong Kong residents can use local documents, international users are also welcome—the process is nearly identical.
KYC Levels Explained
- KYC Level 0: Access to most features except OTC trading.
- KYC Level 1: Full access, including OTC and higher withdrawal limits (up to 100 BTC daily, 5 BTC for internal transfers).
Higher limits are crucial for active traders who move large volumes.
Web vs. Mobile: Account Setup Guide
Web Version
- Visit the AAX website and click “Register” in the top-right corner.
- Fill in your details and create an account.
- Log in, hover over your profile, and go to Personal Center.
- Start KYC Level 1 verification, upload ID and address proof, and submit.
Verification is typically completed within 24 hours.
Mobile App
- Download the AAX app and register using email or phone.
- Log in and tap “Account”, then “Identity Verification.”
- Submit your personal info and documents.
Both methods are straightforward—just prepare your documents in advance.
Trading Fees: Why AAX Stands Out
AAX offers some of the lowest fees in the industry:
- Futures trading: 0.02% for both takers and makers—the lowest among major platforms.
- Spot trading: Starts at 0.1% (taker) and 0.06% (maker), decreasing with higher volume—down to just 0.01%.
- Platform token discount: Pay fees with AAB (AAX’s native token) for an additional 20% off.
Let’s say you open a 1,000-contract long position on BTC/USDT at 9,000 USDT and close at 9,100 USDT:
- Unrealized profit: 100 USDT
- Total fees: 3.62 USDT
- Net profit: 96.38 USDT
Compare that to platforms charging 0.075%—AAX clearly saves you money.
What Is USDT? The Leading Stablecoin
Tether (USDT) is the most widely used stablecoin, pegged 1:1 to the US dollar. Backed by reserves (though not fully transparent), it dominates the stablecoin market with nearly 90% market share and a market cap exceeding $88 billion.
Why Use USDT?
- Price stability: Minimizes volatility risk
- Liquidity: Supported on almost all exchanges
- Hedging tool: Ideal for protecting gains during market downturns
- Fast transfers: Enables quick movement between platforms
During uncertain times—like global economic crises—traders often convert volatile assets like Bitcoin into USDT as a safe haven.
How to Deposit Crypto from External Wallets
To move crypto into your AAX account:
Web Version
- Hover over your profile → Click “Deposit”
- Select the coin (e.g., BTC or USDT)
- Copy your unique deposit address or scan the QR code
Mobile App
- Tap “Wallet” → “Deposit”
- Choose your asset and use the provided address or QR code
👉 Learn how to securely manage your digital assets with advanced tools.
⚠️ Note: Only send supported cryptocurrencies. Sending fiat or unsupported tokens may result in permanent loss.
Buying Bitcoin with USDT: Spot Trading Guide
Once you hold USDT, you can easily buy BTC through spot trading.
On Desktop
- Go to Spot Trading
- Select BTC/USDT pair
Explore key sections:
- Order Book: View active buy (red) and sell (green) orders
- K-Line Chart: Analyze price trends with customizable timeframes (5m, 1h, 1d, etc.) and technical indicators
- Trading Panel: Place limit, market, or stop-limit orders
- Assets Panel: Track open orders, history, and balances without leaving the page
On Mobile
- Open the Markets tab
- Tap BTC/USDT
- Use the same intuitive tools for analysis and execution
You can also bookmark favorite pairs for quick access.
Spot vs. Futures: Know the Difference
| Feature | Spot Trading | Futures Trading |
|---|---|---|
| Asset Ownership | Yes – you own the actual crypto | No – you trade contracts |
| Leverage | None | Up to 100x |
| Profit Mechanism | Buy low, sell high | Long (buy) or short (sell) |
| Risk Level | Lower | Higher due to leverage |
Futures allow you to profit from falling prices by going short—ideal for advanced strategies.
Understanding Margin & Leverage
- Initial Margin: Minimum collateral needed to open a position
- Maintenance Margin: Minimum required to keep it open; below this, auto-liquidation occurs
- Funding Rate: On perpetual futures, paid every 8 hours (UTC 00:00, 08:00, 16:00) to align contract prices with spot
While leverage amplifies gains, it also increases liquidation risk—use wisely.
Where Should You Store Your Crypto?
Exchange Wallets
- Pros: Easy access for trading
- Cons: Risk of platform failure or hacks (e.g., Mt. Gox, QuadrigaCX)
Personal Wallets (Cold/Hot)
- Pros: Full control via private keys; safer long-term storage
- Cons: Slower access; risk of losing keys
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Best Practice: Keep only trading funds on exchanges; store long-term holdings in personal wallets.
Frequently Asked Questions (FAQ)
Q: Is OTC trading safe on AAX?
A: Yes—merchants are vetted, and AAX mediates disputes with verified evidence.
Q: Can I use FPS for OTC payments?
A: Absolutely. FPS enables near-instant bank transfers, making it ideal for fast settlements.
Q: Do I need KYC to trade spot?
A: Yes, KYC Level 1 is required for full functionality, including withdrawals and OTC.
Q: How fast are deposits and withdrawals?
A: Crypto deposits typically confirm in minutes; withdrawal speed depends on blockchain congestion.
Q: Why is USDT so popular?
A: It combines dollar stability with blockchain efficiency—perfect for trading and hedging.
Q: Can I lose more than I invest in futures?
A: No—AAX uses isolated margin systems to prevent negative balances.
Whether you're buying your first Bitcoin or exploring advanced trading strategies, understanding the tools and risks is essential. With low fees, strong security, and user-friendly interfaces, platforms like AAX make Hong Kong a great place to enter the crypto world—just remember to prioritize safety and informed decisions.