Yes. Any Ethereum based ERC-20 issued stablecoin can be held in a personal Hardware Wallet. TrueUSD (TUSD), Paxos Standard (PAX), Gemini Dollar (GUSD), USD Coin (USDC), and DAI (DAI) are all ERC-20 compatible. Blockfer strongly recommends the Ledger Nano S or Trezor hardware wallet for users with considerable stablecoin balances.