I would rather be slower than others without losing money, I feel relieved. You have to manage your capital very well, all in is a double-edged sword. One is all in at the bottom and you will make a big profit. Two is it goes deeper than you and you will run out of capital. I think using 30-50% capital is reasonable. The possibility of BTC going 4x is a bit difficult, but the market is affected by many unpredictable things. If you are lucky, it will come back for you to get on board. If you are not lucky, you already have 30% invested there. I guess most of you have all in the last beat, be careful, the market will be so crushed that you will have to sell off to get back up.