China indeed. Moist people don't know what's gone on since 2008.
It has been RAMPANT in my city since about then. Close to half the homes in my neighborhood (built new in 2014-2016) were purchased by FCB (Foreign Cash Buyers, mainly China) initially. Several sold about 2-3 years ago, turning a nice profit. A bunch more were used for illegal birth tourism (again, China). We call our neighborhood "Little China" because of it, and also because Chinese residents are the majority here. I live in a cluster of 6 houses. When we moved in, only one other was occupied by actual humans. The rest sat empty for a couple years. They have slowly filled in with renters after being sold. Only one family actually purchased the home. The other 5 are rentals. The one next to us was one of the Chinese tourism birth houses. It was bizarre to witness a new pregnant Chinese woman move in every 3 months.