Raven or Nicehash

I started mining a couple of weeks ago with single 1660s. As i checked in whattomine it shows ETH profitability of 2.19USD AND For RVN 1.74USD. As an investment i want mine and keep RVN for longer period, but as i started mining recently i have to take back my investment which is the cost of GPU. So i keep mining with nice has quick miner till date.

Which i have to choose.