Earlier quoted context omitted.
Beware that: “The market can stay irrational longer than you can stay solvent.” (John Maynard Keynes) Especially relevant to short selling
100%. I agree that BTC has been in a bubble, but if I had ever acted on this hunch, I'd be so far underwater right now. There's no telling how long the rally might continue, nor where the correction will settle. The other commenter made the astute observation that the less leveraged way to make this bet would be to go long on some competing asset.
We have gone from %90 negative a couple years ago on HN to about %50 negative today.