A key ingredient in a DAC is the dividend. Bitcoin doesn't have dividends it has tariffs. In this way a DAC is more company like. It should be distributed so that anyone can use its services and so it doesn't have a single point of failure.
Dividends may not be necessary. There are many brick-and-mortar corporations that don't pay dividends to shareholders but simply rely on an increase in share value to reward investors.
The level of risk is very different for our community compared to brick and mortar. I don't think there is any way to even compare the two. Also I don't think we should adopt the weaknesses of that system into our own. We can pay dividends and at rates impossible with brick and mortar because we don't the same overhead and costs to have a CEO to pay, or the corruption. I believe it is corruption of people at the top of the hierarchy who rely on schemes which pay no dividends to shareholders to keep more profit to themselves.
There are some instances where dividends may have to be withheld for sake of profitability of the business but this should be voted on by shareholders, like with cryptocurrency mining businesses which need reinvestment so I don't mean to imply that dividends must be paid all the time but only wish to imply that 1 year in cryptocurrency time is like 5 or 10 years in brick and mortar time. I think for DACs dividends are a preferred option because eventually DACs will be run by autonomous agents.
Blockchains will probably be necessary to keep track of transactions. As for miners, POS seems to be replacing POW, but ideally a DAC would have some kind of mining that uses computing power to help the DAC in more ways than securing the network. If the DAC offers some kind of service, mining should be based on miners performing that service
I agree miners wont be needed in the future if POS can work better.