What's the most expensive thing that I own that I can carry?

2012:
There isn't much I carry that's expensive unless you count wedding jewelry. Second close is my iMac. Sad to say but other than my electronic gadgets, everything else doesn't have much value. My dSLR is probably easier to carry than iMac though. :)

2013:
I haven't acquired anything new this year that would be more expensive than what I already have!

Still the same! The prices on iPhones have gone up, so probably, that would add to the list. Other than that, my external hard drive. Hard drive itself isn't expensive, but the digital kits stored on it, are worth thousands of dollars (yes, 10 years worth of my shopping) and of course, the photos on it are priceless!!!

2019:
Most probably my iPhone X.