A diverse set of economic circumstances around the globe are forcing investors to take an equally diverse approach to investing, Pimco's Mohamed El-Erian said.

Pimco's Mohamed El-Erian

"Bimodal" conditions mean that those employing the simple "risk-on" or "risk-off" approaches are missing both opportunities and dangers, El-Erian said during an interview on CNBC's "Squawk Box."