Human greed is limitless, human desires are insatiable, but just human envy alone would waste any machine in less than no time.
I guess it comes down to who can be greediest, man or machine?
I am sure we will all agree it to be the man who is more greedy. The machine, just fulfills the intent of the man.
So it in fact boils down to who is more efficient at fulfilling the intents of the man, the man himself or the machine? As a matter of fact, the machine can be made more efficient than the man, but it is not that simple since it is the man who made the machine in the first place.
Men and machines both live by rules. Men calls them laws, machines use programs.
But men, unlike machines, can
willingly break the laws imposed on them if they see it more "appropriate" for their needs, right? At the same time, both camps cannot break the universal laws of nature but humans can at least try.
So morally speaking, machines would be better to trust with money because they won't break laws to suit their whims like men, right?
No, quite the contrary. Machines' inability to break laws on their own free will and discretion (because of the lack thereof) doesn't make them more trustworthy, since in any case you would have to trust people who programmed them and which also will be able to hack it as well.
A machine can go wild and this would be even more lethal that a human going mad.