I just feel that the idea of "never selling" is mis understood. You should never sell the best appreciating asset in your portfolio. 8 out of 10 times Bitcoin is the fastest appreciating asset. But what about the other 2 times? If you don't already have massive cash flow, if you don't have a business built, are you telling me your going to hold onto that loss for 18 months before it starts to appreciate again? Well your only going to get roughly 25% a year. Which is great if you got boatloads. But most of us don't have that. So be smart and put your value in the fastest horse always. And bitcoin will have down turns where it's not the fastest horse.
Capital is meant to be used for more capital. It can't do that in a down turn. I personally like the idea of 5x my capital in 4 years vs 2x my capital in the same time frame..