I think PoW will fade as PoS continues to prove superior in scalability with higher transaction throughput. It is better to save money on GPU and CPU, I would recommend looking for PoS cryptocurrencies like DIVI that offers us Masternode with a really easy click or configuring Staking very easily to get 20% performance, the value of the coin is ideal, this year @Diviproject will surprise us with their new collaborations.
Im not going to get too much into the details between POW and POS however staking is not that easy or risk free as most people assume. If you take coins with Masternodes you first need to own a specific amount of that coin to be able to stake. For example if you choose the largest Masternode of all which is Dashcoin you will need 1000 DASH to be able to run a self hosted node.
Right now the price is $200 each, so you will need over $200,000 to be able to stake it. Sure you can stake with a smaller amount using a service however keep in mind there is a counterparty risk there because you have no idea if you can trust them or not.
Another issue is you get paid in the underlying coin such as DASH, not USD. So if the value of DASH goes down, you will end up making less money. DASH might be more stable than some of the other smaller cap masternodes out there however its still very volatile.