This only reads that way looking back over a raising value. Look at a stock that goes to 0 and call the people that sold early fearful of losing,

When the stock/crypto goes up 100% people will gladly take their profits and go on with their lives, instead of waiting for even bigger profits.

When the stocks starts its fall towards 0 people will do incredible mental gymnastics, clinging to any shred of hope that things will turn around and they will revert their losses, so it takes them much more time to get out of the bad investment.

And when crypto goes to 0?

What is the most likely scenario in which you see Bitcoin changing hands for ~0 value, or I suppose not changing hands?

People want to get real money out of it.

I transfer it to people on the slowest method for 1st borns baby shower. I used it on furniture at Overstock.com while they allowed it. I gamble with it. I have donated with it.

For me and probably many others, when expediency isn't an issue, BTC works great.

Bitcoin will never go to $0 because if it ever got to $1 I'd buy all 21 million of them. And there are lots of people like me.

Not if the algorithm is cracked and the supply of bitcoin increases. It’s possible for bitcoin to go to zero. Shouldn’t happen, but it can.

The supply wouldn’t even be increasable if SHA256 is cracked

This is true in crypto, but not true in Bitcoin