Bike Commuting

I just recently got into using a bike for commuting and I was wondering if this is a good way to secure my bike? I know, previously, people would recommend only needing to lock the back tire to a solid object, but I’ve seen videos of people easily cutting the back tire, breaking it and taking the frame/front tire. My method of locking is sort of similar, except I do lock around the splash guard. If this isn’t very secure, I’d have to get a longer ulock or chain, because there doesn’t appear to be an easy way for me to lock around the back tire, frame and solid object with my current ulock. Any suggestions are appreciated.