Well ETH was actually suppose to go POS back in Summer of 2016. Now 5 years later and still no POS. One thing that ETH dev team is great at is missing deadlines. So there is no concrete answer when it will go POS.

You bigger issue is that ETH sustains its >$2500 price and that the difficult stops growing. Apparently there are many high tech ETH ASICs out there and it will keep increasing the hashrate for the near future, not good for GPU miners.

POS is your last worry right now.