Parity Signer is a secure way of storing your DOTs on an air-gapped device. It is highly recommended that you turn off wifi, cellular network, Bluetooth, NFC, and any other communications methods after installing it. Most secure way of storing Polkadot.Visit Website
Wallets that support Ethereum (ETH) such as Ledger and Trezor also support any ERC-20 token (token built on top of Ethereum such as AAVE, YFI or USDC). Not every ERC0-20 token will be listed below.