I was hoping we could use another word for the collective noun, like a "crypto" of bitcoins or a "hash" of bitcoins. You know if you suspect another bubble in the future you should keep mining now.
Cultures have reified, i.e. named certain sized groups when that made sense to make conversation more concise. For example when I say a herd of cattle or a flock of birds, or a school of fish, you have a commonsense shared notion of how many individuals are in the group. Likewise, when I say a stack of dollars or a ton of gold, these group noun phrases suggest a certain quantity.
Given that the value of bitcoin is not yet stable, I think that it is premature to look for the sort of collective crypto noun phrases you mention. However, I would like to have a phrase that encompasses what is vulgarly called Fuck You Money - which is the quantity of money that allows one the freedom to live without working for a boss.
"shitload of coin"
"lot of coin"
"enough coin"
"frozen cold wallet of coin"
"Satoshi's lost stash of coin"
... etc.
If and when my power costs exceed my GPU rig leasing profits, then I will power off and buy coins with the the new found fiat that I would have otherwise spent on power.