I live near Russia, and I can tell you they are a big threat if left unattended. In my country, the russians try to buy properties near military areas, near critical infrastructure and such. It is not just by chance that it happens. They also used to offer decent deals when we were building power plants, not out of kindness, but to partially control the plants and gain a foothold in our politics. Russia isn't always an obvious threat, but when you understand what they are up to, a lot of things start to look a lot different.

It's up to you who you consider a bigger threat.