How to get crypto with fiat
Before your wallet can trade, it needs two things on the Arbitrum network: USDC (the asset you'll trade with) and a small amount of ETH (to pay network fees). This page walks through the most common ways to move fiat — USD, EUR, GBP, etc. — into both.
Cybmatic does not sell, broker, or custody any of these assets. You interact directly with the exchange or on-ramp service of your choice. This page is educational only — not financial advice.
TL;DR — the recommended path
- Create an account on a major centralized exchange (Coinbase, Kraken, Binance, Bybit, etc.) and complete KYC.
- Deposit fiat via bank transfer (cheapest) or card (fastest).
- Buy USDC on the exchange.
- Withdraw USDC to your wallet, and select the Arbitrum network.
- Buy a small amount of ETH ($5–$20 is plenty for fees) and withdraw it the same way.
Buy on a centralized exchange, then withdraw on Arbitrum
Best mix of low fees, trustworthy pricing, and broad availability.
How it works
- Sign up on an exchange that serves your country (examples below).
- Complete identity verification (KYC).
- Deposit fiat — bank transfer is cheapest, card is fastest.
- Buy USDC (sometimes listed as USDC or USD Coin).
- Go to Withdraw, paste your wallet address, and pick Arbitrum One as the network.
- Repeat for a small amount of ETH.
Exchanges that support Arbitrum withdrawals
- Coinbase
- Kraken
- Binance
- Bybit
- OKX
- Crypto.com
Availability depends on your jurisdiction. Cybmatic does not endorse any specific exchange.
Fees & timing — what to expect
- Bank transfer (SEPA / ACH / Faster Payments): cheapest (often free), typically 1–3 business days.
- Debit / credit card: fastest (minutes), highest fees (typically 2–4%).
- USDC withdrawal on Arbitrum: a few cents of network fee, arrives in seconds to minutes.
- Exchange withdrawal fee: varies by exchange (usually $0–$2 for USDC on Arbitrum).
Buy directly to your wallet via an on-ramp widget
On-ramp services (MoonPay, Ramp Network, Transak, Banxa) let you buy crypto with a card or bank transfer straight into your wallet address. Many Web3 wallets (MetaMask, Rabby, Trust, Coinbase Wallet) embed one of these providers inside the wallet UI itself.
Pros
- Fastest path — minutes, not days.
- No separate exchange account required.
- Delivered directly to your wallet address.
Cons
- Higher all-in spread and fees (typically 3–6%).
- Not every provider supports USDC on Arbitrum directly — double-check the network before confirming.
- Lower daily / monthly limits than a full exchange.
Check inside your wallet — there is often a Buy button that runs this flow for you.
Peer-to-peer and local options
Some regions also have P2P marketplaces (e.g. Binance P2P) or local fiat on-ramps. These can be useful where banking access is limited, but they demand more care — always use escrow, check counterparty reputation, and never move crypto off-platform before fiat has settled.
Bridge from another chain to Arbitrum
If you already hold USDC, USDT, ETH, or SOL on another chain — Ethereum mainnet, Solana, BSC, Polygon, Base, Optimism, etc. — you don't need to sell back to fiat. A cross-chain bridge moves your funds directly onto Arbitrum in a single swap, typically in minutes.
Suggested bridge: Mayan Finance
mayan.finance supports many source chains (Solana, Ethereum, BSC, Polygon, Base, Arbitrum, Optimism, and more) and lets you choose both the destination chain (Arbitrum One) and destination token (USDC) in the same swap. It auto-routes for best price and usually settles in minutes.
Cybmatic is not affiliated with Mayan Finance. Always verify the URL carefully before connecting a wallet.
How to bridge
- Open the bridge and connect the wallet that holds your source funds.
- Select the source chain and source token.
- Set the destination as Arbitrum One, destination token as USDC.
- Paste your Arbitrum wallet address (or keep the same wallet if it already supports Arbitrum).
- Review the quote (fees + estimated time), approve, and confirm.
Watch out for
- Double-check the destination chain & token. For Cybmatic you want Arbitrum One + USDC.
- Phishing sites copy bridge UIs. Bookmark the real URL and never click bridge links from DMs, ads, or search engine sponsored results.
- Keep a small amount of ETH on Arbitrum — bridging USDC alone is not enough to pay gas for subsequent transactions.
- Slippage and bridge fees vary by amount and source chain — always review the final quote before confirming.
Common pitfalls to avoid
Wrong network
Sending USDC on Ethereum mainnet instead of Arbitrum is the #1 beginner mistake. The funds arrive, but network fees are 100–1000× higher. Always select Arbitrum when withdrawing.
No ETH for gas
Arbitrum transactions cost a tiny amount of ETH. If your wallet holds only USDC, you won't be able to sign transactions. Keep $5–$20 worth of ETH on Arbitrum at all times.
Below the exchange's minimum
Each exchange sets its own minimum trade size and minimum withdrawal. Starting with very small amounts can leave you unable to place orders or withdraw efficiently.
Wrong token
USDC and USDT look similar but are different assets. Cybmatic's grids trade USDC pairs by default — buy USDC unless you've configured otherwise.
Address typos
Always copy-paste your wallet address; never type it. Verify the first and last 4 characters match on both sides before sending.
KYC delays
Bank transfers and KYC reviews can take 1–3 days on first use. Start this process a few days before you plan to go live.
Once your wallet is funded
You're ready to continue the Cybmatic onboarding:
- Go back to Get started and confirm the Fund wallet step.
- Create your Hyperliquid agent key (the site walks you through it).
- Deposit USDC from your Arbitrum wallet into Hyperliquid to fund your strategy.
Ready to continue?
Validate your wallet, create an agent key, and go live — all from the onboarding flow.
Back to onboarding →