From what I see, your list is ok, but wouldI  I touch them with...

From what I see, your list is ok, but wouldI  I touch them with a bargepole, likely not.
Esp: likes of CHP. shonk

I had a go at FFG once as my brother was going on about Bitcoin, and so as they had a significant holding in ICI, I had a tiny punt. 
Bloody waste of time unless you know what these companies are really doing to make a $....

Mining Bitcoin and other currencies is currently almost worthless.
may as well buy a few Bitcoin...as this group just burns capital 

be very wary of listed businesses in this space imo.