We know the setup for mining a bitcoin will cost you a lot now, so do you think instead of buying a setup just use the fund to directly buy bitcoin?
It depends on you.
If you have a big budget then I suggest you to mining rig. otherwise, I suggest you buy bitcoin and do margin trading. mining rig is quite risky because of the bitcoin price factor that tends to fluctuate and it also will affect how long you get the ROI.