I think hybrid like Decred is the best. It has POW and POS and their POS also happens to be the most profitable at 1.38% a month as of today. The best thing about POS is that you buy and hold, earn interest and can sell at any time. With POW you need to dedicate a lot of money into the equipment, need to pay costs of electricity and if the network gets flooded with ASICS you lose your ass and will never make your money back unless you mined and hold for the long run. Either way you have to hold but POS is the safest bet.