but i then came across some new coins like Swipe, which i'm confident that it does not generate that much in transaction fees, and yet the rewards are high?
Let me explain in simple terms. When it comes to rewards, POS is like POW but you just need to hold your coins in a wallet that can stake. In general, the rewards doesn't necessarily comes from transaction fees alone, rewards can also include new coins that is mined from staking and is added to the circulating supply. Though reward distribution method varies from different projects.
Difference between POW is and POS coins are huge. POW ypu need hardware (miners/gpus/cpus) to generate new blocks. If you happen to hit a block you get the block reqard and tx fees, with POS coins you stake coins in your wallet and get block rewards based on your weight compared to the entire network weight.
You are absolutely correct, with this explanation Sir, I definitely agreed about your statement regarding about
POW and POS, just all I know is that if ever you choose ETH to stake in, you need at least 32 ethereum for you to be able
to be part of their program in staking where that was a huge amount.