Thoughts on a 2FA Tool for Cold Wallets

Hey guys, Been tossing around an idea for a Windows app and really need some honest opinions before diving in. Here's the plan: A 2FA tool for cold wallets. Basically, if you’re trying to send coins, you gotta verify it just like with Google Authenticator. No code, no transaction. It's pretty secure already having your coins offline, but if someone somehow breaches your PC, they could try to initiate a transfer without the second step. This adds that extra security layer. For starters, I’d focus on Bitcoin first, then roll it out to other UTXO coins like Litecoin and Dogecoin later. Thoughts?