Definitely Proof of Stake, it is easy to use. It significantly reduces energy consumption and does not require such high computing power, gradually all cryptocurrencies will switch to an undeveloped model.
it's easy to be used and it doesn't need a lot of maintenance cost but it offers more risks compared with mining consider about your money totally depends on the price of the token itself. Im doing staking and mining right now and it looks like for me mining gives more guarantee rather than staking. staking is a very good thing when you are having a lot of money and it's too difficult to move into another crypto.
In this case, even mining needs a lot of maintenance costs but it looks safer.