Depends on how much you put in and what rets you want. Both my bags were bought @ 2-3mn sats. One of them is staying put til we top out on 19mn sats, somewhere in Q3-Q4. The other is for riding the breakout's, buying back the dips, rinse and repeat.
For selling you should pay attention to signals which can then bloom into moons. Spotting ell wave + cup and handle chart patterns are beneficial here.
Most importantly never place your bids too early and don't be the panic in room. Lastly, if you bought off exchanges, always have your exit set, before opening a position.