i think mining is safe.. because its no risk .. but trading is very risky. if u experienced on marketplace then prefer you for trading.. or if you not experienced then mining is best for u.
I love every tiny thing about mining, but when I first calculated ROI I'd make it back in 4 months. Now it's just short of a year. Trading can do alot more. But I really love mining, one day another coin may come up that's ridiculously profitable.