When ethereum switches to Proof of Stake (PoS), will existing miners be able to be repurposed?

I'm pretty knew to crypto and mining. Right now I only have a Minidoge, and another Doge machine on order. I've been considering getting into Ethereum, but with the pending switch to PoS, I don't know if there will be any value/opportunity for small scale 'miners'.

If this switch does eliminate the small scale miners, doesn't that sort of undo one of the main points of crypto?