I think bitcoin is the king, so holding altcoins (even ethereum) is high-risk method right now, if bitcoin hits 25-30K many altcoins will drop 100% at latest, so trading is the safest way for me!
in your opinion what is the safest way to gain 1% daily profit from trading?
Trading is a high risked job. You can make 10% day by day... and lose everything one day. First of all you need to track your progress for a long term interval (half a year or more). There is no sense to make 1% per day if there is a possibility to lose everything at once.