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Buy Cartesi (CTSI) — A simple guide
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Optimism ecosystem
Optimism develops the OP Stack, technology used to build connected blockchain networks, including OP Mainnet. The wider ecosystem includes applications and chains with their own tokens and operations.
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Understanding the Optimism ecosystem
Browse the buying guidesUsing related software does not make every asset the same as OP or give its holder rights over the whole ecosystem.
How it works
For any application, identify its actual deployment and the security, bridge and upgrade arrangements of that chain. Governance tokens, fee-paying assets and application tokens can perform different functions. A transfer between OP Stack chains may still require a supported route rather than a normal same-chain payment.
Explore the foundations
Blockchain Explained: Follow a Transaction from Wallet to Confirmation↗
Cryptocurrency Wallets Explained↗
Blockchain explorers: trace a transfer step by step↗
Sources and further reading
A little groundwork goes a long way
Before your next purchase or transfer, understand who controls access, where your crypto is going and what the trade will actually cost.
Protect access to your crypto
An exchange account and a self-custody wallet need different safeguards. Protect exchange logins with a unique password and strong two-factor authentication. For self-custody, your recovery backup is what lets you restore access.
Keep recovery words offline and private. A support agent or website asking for them is a reason to stop.
See a recovery example
Your phone breaks. An exchange may help you recover your account after identity checks. A self-custody wallet cannot reset your recovery phrase. Check your wallet’s official backup instructions before relying on it.
Choose the right transfer network
The asset, token version and network must be supported at the destination. A familiar ticker or a matching address format is not enough. Read the receiving platform’s deposit instructions before selecting a withdrawal network.
Check the address, any required memo or tag, fees and minimums. Consider a small test transfer first.
See a network example
Your destination accepts USDC on Ethereum. Selecting a cheaper network at the sending exchange does not make it an Ethereum transfer. Use a network both ends support; an ordinary withdrawal does not bridge tokens.
Understand the price you pay
Trading fees are only part of the cost. The spread, available liquidity and withdrawal charges also matter. A market order prioritizes execution; a limit order controls the price but may remain unfilled or fill only partly.
Check the order preview and the amount you will receive, then compare the full cost of your intended purchase and withdrawal.
Work through a cost example
Hypothetical example: a $200 trade with a 0.1% trading fee costs $0.20 in trading fees. A separate $5 withdrawal fee brings those charges to $5.20. Spread or slippage may add more; these are not quoted exchange rates.
