This is to ensure I'm not losing money at any point.
This is all well and good in practice, but there is no way you guarantee you're 'not losing money at any point'. If it was that easy, everyone would be doing it.
In answer to the OP, I'd ladder my sales out, and make sure to keep a bit back in case it really flies. Start selling at around 20% up, can always come back in if it drops. And it's not easy to keep emotions out of it if it jumps up rapidly in a short amount of time. I guarantee a lot of people could have made much more money if they'd sold back in January, but the 'red mist' takes over and people get greedy (me included). I hope I learnt my lesson, it was a tough one, but will only know for sure when the market starts moving again.