Could be! If the thorax (section between head and wings) has jagged zig-zag edges, it's definitely one of the many grain beetles. Those are the ones easy to ID. But if it's powderpost beetles...much harder to find out what they're eating. Look for holes or sawdust around any new old wood you've brought into the home in the last year or so (like antique furniture). Either way, best to get an ID, either from a local extension agency or identifying where they are coming from (or better photos and someone who knows beetles here can help). Better than bedbugs, right?

If it is happening right now, it is the normal time of year for the greenery to die off for the winter. That is what mine look like when they die back for winter. In the past, when I have moved mature tree peonies, the above ground plant eventually died off and new scions pushed up out of the ground the next spring. There will be some normal die off of wood and just trim it off. Otherwise, let the foilage fall off.

It's Japanese Imari ware in the Arita fan type of pattern. The Arita fan is a style of a pattern not a cut and dried pattern. From the back appears to be late 19th century, possibly very early 20th. Very nice piece!! There are newer pieces out there but you can tell by the back that yours is old. https://www.google.com/search?q=Imari+plates&rlz=1C1PQHB_enUS634US642&sxsrf=ACYBGNS6P2I-fdvi8r-jU1pW8LGOySKY_A:1578034437964&source=lnms&tbm=isch&sa=X&ved=2ahUKEwic2fiw7ObmAhUPH80KHcwKD7MQ_AUoAnoECA0QBA&biw=1280&bih=610

Looks like a Crassula ovata (Jade plant) that is a big leggy - reaching for the light will do this to succulents (and other plants).