Reusing one EVM address creates a consolidated public history across transfers, token holdings, approvals, and application interactions—and sometimes across multiple EVM networks.
Why reuse is convenient
One address simplifies wallet interfaces and receiving, but every new transaction adds context to the same account.
Cross-network repetition
Ethereum, Base, Arbitrum, Optimism, and other EVM chains may use the same address format. Reusing the same key does not merge ledgers, yet observers can query the matching address on each.
Fresh addresses have operational links
Gas funding, token transfers, shared exchange accounts, and later consolidation can reconnect addresses even when the strings differ.
A measured recommendation
Use compartmentalization where it matches the security model, while treating it as exposure reduction rather than guaranteed unlinkability.
How to read the evidence
Ethereum evidence is account- and execution-oriented. Review the externally owned account, nonce, gas payer, transaction target, calldata, receipt, logs, token approvals, and internal effects. Verified contract interfaces can make an interaction easy to interpret, but raw records remain when labels are absent. Reusing the same EVM key across networks can also make cross-network research simpler.