Bitcoin, as the first and most prominent cryptocurrency, continues to attract growing interest from investors worldwide. Known for its decentralized nature, fixed supply, increasing institutional adoption, and low correlation with traditional financial markets, Bitcoin has become a compelling asset for portfolio diversification. If you're new to the space, you might assume that investing in Bitcoin requires large amounts of capital — but that’s not true. Even with as little as $10 or $20 worth of local currency, you can begin your journey into crypto ownership.
This guide walks you through how to buy Bitcoin using the OKX app and how to cash out your holdings safely and efficiently. Whether you're a beginner or looking for a refresher, this step-by-step tutorial covers everything from account setup to full conversion back into fiat currency.
Getting Started: Download and Register on OKX
Before purchasing Bitcoin, you’ll need to create an account on a trusted cryptocurrency exchange. OKX is one of the leading global platforms, known for its robust security, user-friendly interface, and wide range of trading options.
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Once registered, download the official OKX mobile app to access all features seamlessly.
Step-by-Step: Buying Bitcoin via USDT on OKX
The most cost-effective way to buy Bitcoin on OKX is by first purchasing USDT (Tether) — a stablecoin pegged to the US dollar — and then exchanging it for BTC. This method often offers better liquidity and lower fees.
Step 1: Access C2C Buy Section
Open the OKX app and tap "C2C Buy" on the homepage. This section allows peer-to-peer transactions where you can buy USDT directly with your local currency (e.g., CNY, USD, EUR).
Step 2: Choose Quick Trade Mode
Select "Buy USDT" and enter the amount you'd like to spend — for example, 100 CNY. The system will automatically calculate how much USDT you’ll receive based on current market rates (e.g., ~13.9 USDT for 100 CNY).
Step 3: Select Payment Method
Tap "Choose Payment Method" and link your preferred bank transfer, Alipay, WeChat Pay, or other supported options. Then click "Preview Order", followed by "Get Payment Details".
Step 4: Complete the Transfer
Send the specified amount to the seller’s provided account. Once done, mark the payment as complete by tapping "I have paid". After the seller confirms receipt, your USDT will be credited to your funding account.
Transfer Funds to Your Trading Account
To trade USDT for Bitcoin, you must move your funds from the funding wallet to the trading wallet:
- Go to Assets > Transfer
- Select From: Funding Account, To: Trading Account
- Choose USDT as the currency
- Enter the full amount and confirm
Your USDT will now be available for trading within seconds.
Buy Bitcoin Using USDT
Now that your funds are in the trading account:
- Tap the "Trade" tab at the bottom
- Search for the BTC/USDT trading pair
- Choose Market Order (for instant execution at current price)
- Enter the amount of USDT you want to spend (e.g., 14 USDT)
- Tap "Buy BTC", then confirm
Within moments, your Bitcoin will appear in your trading wallet.
💡 Pro Tip: Use Limit Orders if you want to set a specific price target and wait for market conditions to meet it.
How to Cash Out Bitcoin on OKX
When it’s time to convert your Bitcoin back into spendable fiat currency, follow these steps:
Step 1: Sell BTC for USDT
Return to the BTC/USDT trading pair in the Trade section. This time, select Sell, choose Market Order, input the amount of BTC you wish to sell, and tap "Sell BTC".
Step 2: Transfer USDT Back to Funding Account
After the sale:
- Go to Assets > Transfer
- Move the received USDT from your Trading Account back to your Funding Account
Only funds in the funding account can be used in C2C transactions for cashing out.
Step 3: Use C2C to Sell USDT for Fiat
Navigate back to C2C Buy, but this time select "Sell USDT".
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Choose a reliable buyer by filtering for:
- High trade volume
- Strong completion rate (above 95%)
- Long registration history
For example, a seller registered since June 2022 with thousands of completed trades is likely trustworthy.
Click "Sell", enter the amount, and proceed with "0 Fee USDT Sale". Wait for the buyer’s payment confirmation. Only after you’ve verified receipt of funds should you click "Confirm Receipt" to release the USDT.
Frequently Asked Questions (FAQ)
Q: Can I buy Bitcoin with just 100 RMB?
A: Absolutely. Bitcoin is divisible up to eight decimal places (1 satoshi = 0.00000001 BTC). Even small amounts allow you to own a portion of a Bitcoin.
Q: Is it safe to use C2C trading on OKX?
A: Yes — OKX provides escrow protection during C2C trades. Funds are held securely until both parties fulfill their obligations, minimizing fraud risk.
Q: Are there fees when buying Bitcoin via USDT?
A: While C2C trades typically have no fees, standard trading fees apply when converting USDT to BTC. These are generally low (around 0.08% for takers).
Q: How long does it take to cash out?
A: Transfers between wallets are instant. C2C withdrawal speed depends on buyer response time but usually completes within minutes.
Q: Can I use OKX without KYC verification?
A: Basic functions may be accessible without full KYC, but higher limits and certain features require identity verification for compliance.
Q: What makes OKX better than other exchanges?
A: OKX supports over 22 languages, integrates Web3 wallet functionality, offers diverse financial tools (like staking and lending), and maintains strong security protocols — making it ideal for both beginners and advanced users.
Why Choose OKX for Buying and Selling Bitcoin?
Among major exchanges like Binance, Huobi, and OKX, each has its strengths. However, OKX stands out due to several key advantages:
- Competitive trading fees (as low as 0.02% for makers)
- Built-in Web3 wallet access from the "Discover" tab
- Comprehensive financial services including crypto lending, staking, and Jumpstart (token launchpad)
- Real-time market data and social trading features like copy trading
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While Binance offers deep liquidity and Huobi provides solid global support, OKX delivers a balanced blend of usability, innovation, and security — especially valuable for users prioritizing ease of access and multi-functional tools.
Final Thoughts
Buying Bitcoin doesn’t have to be complicated or expensive. With platforms like OKX, anyone can start investing with minimal capital and gradually scale their holdings over time. By leveraging stablecoins like USDT and using secure C2C channels, you minimize price volatility during onboarding and ensure smooth entry and exit from the market.
Remember to always:
- Double-check payment details
- Trade only with high-reputation counterparties
- Enable two-factor authentication (2FA)
- Withdraw profits regularly to reduce exposure
Whether you're planning long-term investment or active trading, mastering the process of buying and cashing out Bitcoin is essential — and now you’re fully equipped to do so confidently.
Note: This article is for informational purposes only and does not constitute financial advice. Cryptocurrency investments carry risk; conduct your own research before making any decisions.