I bought 10 th's before the price increase. 150/th vs 220/th now. at 15k per coin you were looking at about 2 months to Break Even if price and difficulty stayed the same. To me I had a better chance of that vs BTC doubling again in 2 months.
With the current BTC price ROI is now closer to 4 months than 2 but you still make money. Beside that absolutely agree with what you said.