Will interest rates actually ever drop back below 3-4%?

[Chris John]

I feel like I'm hearing a lot of people say stuff like "don't worry about buying when rates are high because when they drop you can always refi to a lower rate".  However, historically, rates aren't high.  I don't think I'm alone in feeling like the past several years, rates were pushed artificially low. 

So, what's the consensus on rates dropping back below 3-4%?  Is it a foregone conclusion to happen?  I don't necessarily think so, personally, but I'm really curious to hear some opinions if you're willing.