It shifts a lot its a debatable thing especially as new ASICS come out that affect older ASICS and thats what really drives difficulty up and if bch fails a lot would move back to btc
With current market conditions I don't think any token mining will give profit. Crypto is the future, it's growing Baby juts needs to go through some more hiccup.
No one knows the reason behind these dip market states for sure but am very hopeful that soon all these will be a thing of the past for a better experience