I can sypathize — I have an expensive mountain bike. Not $10k mind you, but expensive enough. This bike actually is rare enough that the mountain bike community will assist in keeping an eye out for it. I’d hit up all the local mountain bike forums for everyone to keep an eye out on the trails.
Either that, or someone needed a DUI cruiser and it will be parked at the local bar.
A couple of weeks ago I saw a middle-aged Hispanic guy, looking like he was going to work at a restaurant, riding a very expensive Italian racing bike. It was pretty clear he had no idea what he had there.