Now I have 10x my investment in EUR, that will go back to diversified value investment that, till now has been the best protection for my money.
I also had 10x in bitcoins, but then you know what happened this week. If bitcoin manages to transition from a binary commodity to a currency and a safe haven, I will be only half the millonaire I could have been. Otherwise it will collapse to 0 as people understand it has no other value. I will try to anticipate that and save the little left.
And if everything goes wrong, then I will dig up the two kilos of gold buried in the garden ten years ago, split it in small pieces, and try to survive with that.
I think the "cash out a part at 10x profit" is a viable strategy if you have the need for the money or have another investment to diversify to.
I, for example, don't need the money. I am making more than I need every day. Also I don't have other investments that could deliver even nearly the same returns as bitcoin. So I am prepared to invest more and more into bitcoin and never cash out. The number of my bitcoins will only ever grow. If the protocol is destroyed, but the world somehow is not, I have enough gold and silver. But I don't have the urge to cash out of bitcoins no matter how high it goes. If anything, I will divert a part of the daily earnings to something else than bitcoins, just for diversification's sake.