Locking up a bike is a crapshoot.

The most secure way to secure your bike and not worry about it walking off, FOR ANY duration, is to always bring your bike inside with you and lock it in your office. Second-best-a full-blown-whole-bike bike-locker enclosure made of plate steel that costs money to rent. I've had roadie mates with the best locks money could buy who knew how to use them, who parked in the least-bad of areas to be had (none are good TBH), who in 10-15 minutes were out $1500+USD with their bike gone.

Thieves will take anything that is stealable given opportunity and want. Whether it is a wheel or a frame or a bike.