I would be very happy with 5x, but no doubt i will have cashed out before then anyway. Invested 1 BTC so i might take it back out at 3x and ride the rest.
That's the safe way to play it ... once you get your initial investment back, just leave the coins alone and wait.
That's exactly what I did with my ICO haunch of Synero. I sold half, walked away with my initial buy plus a nice profit, rolled the proceeds into Bitcoindark, and stuck the rest of my AMPs into a "HODL wallet." I don't mind waiting
years to see how far Synero goes!