Buying rural land, especially ag land, is one of the smartest decisions you can make, IF, you're buying it for the right reasons and do your homework. Such land usually only comes up for sale once in a lifetime and there's never a shortage of buyers should you want to sell. Because it's ag, taxes are cheap, and you can always go CRP if you think payments will be higher.
If we're talking about a small plot for a future home that will require yearly maintenance to keep clear and isn't useful until the shit hits the fan, that's something else. But if you can get your hands on 20, 30, 50 acres or more that are either in production, or can be returned to production, you'll have a guaranteed revenue stream without any of the headaches that apartment landlords have to deal with (maintenance, insurance, late payments, utilities, etc).
Make sure you're aware of any easements and covenants and verify that you meet any jurisdictional requirements for building (should you ever choose to) as some townships require holding a minimum number of acres to build a house, and you'll have productive land that pays and a place to escape to should you want to. Keep in mind road access, electricity and whether or not the land is suitable for a well and you'll be set.