Filled with rookies? What do you think

Pretty much filled up my bench with rookies just now. I dropped Boyd (8 man PPR), for Devin Singletary. I had Mixon and Kerryon so I’m pretty much praying one of my rookie RB’s hit.

Here is my bench.

Josh Jacobs (I consider him a hit)
Darren Waller
Miles Sanders

The rest of the lineup is
QB: Lamar Jackson
Davante Adams
Sony Michel
Evan Engram
Mixon Kupp

Holding onto so many rookies… is this upside worth it?