What is the best strategy?

So currently I’m mining with 6x 3070 (NON-LHR) on ETH with approx 30$ revenue and once I get a payout I convert it to RVN. I have now the idea to buy new GPU’s with the profit I make each month. But there is also the possibility of increasing price of RVN. So I don’t really know what the best practice is. Do you have any suggestions?