Is using a yubikey authenticator app “safe enough” or should I be doing more to keep assets safe on exchanges?

I try to be very security-conscious so I keep most of my crypto assets parked in cold storage, but I do want to keep a small fraction on the exchanges for quicker access. Main goal is to have immediate access to execute at certain strike prices and such specifically on Uphold and Coinbase. I am currently using a yubikey combined with the yubico authenticator app for 2 factor authentication, but I am wondering if that's secure enough or if there is a better option. I have two copies of the authenticator app, one on my pc and another on my phone. The app does not function without a physical key plugged into the usb or charging port on these devices. Is this safe enough or are there better methods for securing assets on exchanges?