In fact, if he offers to do so, it looks as though he were running a bucket shop.
Of course, if you take the bucket shop's advice you surely are likely to be wrong.
Once bit, twice shy; and as for the bucket shop, I'll have none of it.
Creed is as akin to righteousness as a 'bucket shop' to the kingdom of heaven.
It made Rockefeller's little kerosene speculation look like ...