Public Wi-Fi is a context, not a verdict
The FTC says public Wi-Fi is usually safe today because encryption is widely used. Look for HTTPS, keep your phone and apps updated, and protect accounts with strong passwords and two-factor authentication. HTTPS protects a connection to the named site; it does not certify that the site is honest. Scammers can encrypt fake pages too.[1]
CISA gives a more cautious checklist: confirm the network name and sign-in process with venue staff, turn off automatic connection, and use your own mobile hotspot when practical. It also advises avoiding sensitive activity on public Wi-Fi. These are prudent choices, not proof that a particular café or airport network has been attacked.[2]
A VPN changes the network path and the party you trust
A VPN app routes traffic through its provider. If it encrypts the traffic sent through its tunnel, nearby Wi-Fi users have less access to that traffic. Apps differ: some encrypt only some traffic or none, and settings such as split tunnelling can route selected apps outside the tunnel. Check the service’s actual behavior and settings; the word “VPN” alone is not proof of coverage.[3]
HTTPS and a VPN do different jobs and can complement each other. HTTPS protects data between your browser and the website and validates the website connection; a VPN can protect traffic between your device and its VPN server. The VPN provider becomes another party to trust, and a VPN does not make you anonymous or stop a site tracking information you give it.[4][3]
Why a VPN cannot secure a wallet by itself
A Secret Recovery Phrase restores a self-custodial wallet; anyone who obtains it may access its keys and assets. Never enter it on a site or give it to “support.” A VPN cannot identify a fake support account or phishing page , and HTTPS does not make a page trustworthy.[5][6][7][1]
A token approval can let a dapp move tokens; this differs from simply connecting a wallet. Check the requested permission before signing and reject anything unclear. Revocation is an on-chain transaction and may cost gas; a VPN cannot undo a signature. Wallet and network details vary.[8]
Before joining, disable auto-join and verify the network name with staff; use a trusted mobile connection for sensitive wallet or banking work when practical. Open wallet sites from a verified bookmark, never disclose the recovery phrase, and decline any signature you cannot explain.[2][7][8]
Verify VPN coverage before relying on it
Before a sensitive session, consult the VPN app’s official setup and privacy information: does it encrypt traffic, and which traffic is actually included? The FTC warns that some apps encrypt only part of traffic or none, and may request sensitive permissions or share information. Review the permissions, terms, and privacy policy; a VPN provider becomes a party you trust. If coverage is unclear, do not treat the VPN icon as proof that your wallet traffic is protected.[3]
Audit wallet permissions after the task
A wallet connection and a token allowance are different permissions. MetaMask explains that disconnecting a dapp does not itself revoke an allowance to move tokens. After a dapp task, check the wallet’s official allowance view or instructions and consider revoking permissions you no longer need. Revocation is an on-chain transaction and can cost gas; periodic review is useful if you use dapps regularly. Controls vary by wallet and network.[8]