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!
Are you saying if bitcoin reach that price, altcoins will be useless? I do not think so.
in your opinion what is the safest way to gain 1% daily profit from trading?
There is no safe and sure way to make profit in trading, it is always risky especially if you are targeting daily profit. But for me, what works is scalping the market for small profits. You can do this on large volume coins but needs large capital so that small increase or decrease in price is significant enough to make profit.