crypto robot

Does someone know how to predict a fall, are there any robots or some service that can help one (in an easy way) figure out when to buy e.g. bitcoin or sell? For a beginner in cryptoland, this is probably difficult!

I wonder if you someone know is there a ROBOT to trade crypto, it need something that is for beginner I don't know how trading works but would like to see if I can make some extra money? Any suggestion or input is good please.