The one and only safest Method is FAUCETS. No investment, No Risk, No Tension. There are lot of Faucet rotators to simplify your job.
but the earnings from faucets take a very long time and it is so small that it is not worth the time you spend filling in the captchas.
rewards for faucets are too small.
its a waste of time and effort and electricity if you are on a desktop.