would it be crazy to buy 100 gridseed at this moment? seems could see roi lot faster on betarigs
There is a lot less risk in renting rigs, but you have to pay a premium to cover someone else's time/money/effort. Owning rigs will always bring more profit (assuming you don't lose money on the hardware), but you have to gauge your risk tolerance, time to invest, and knowledge.
I gambled on over 100 Gridseed. Profits are good but they will reduce every month. I'll take those gains and pay for titian in 3 months to keep it going. ROI is a long way away for me. But hey no risk no gain. Sometimes you need to go with your gut.
I think that's a good strategy, and that's what a lot of miners who mine BTC directly do. You'll have to constantly cycle out old equipment every 3 months so that you stay ahead of the curve, and make sure you don't get stuck with worthless gear.
I read in the BTC mining threads that some miners think the actual mining pays for the cost of their equipment... selling that equipment after 3 months is when they generate profit. I guess that assumes that you cover equipment costs in 3 months, but I don't know if that's completely possible anymore.