BitCoin i svery similar to a gold backed currency. The fact that nearly all (?) currencies moved off the gold standard should tell you something of how economists view the gold standard.
Are there any official currencies that this doesn't apply to?
Whether a gold (or Bitcoin) standard is good for the world economy as a whole is irrelevant, since the governments hold the power to implement it (or ban Bitcoin) and will act in their self-interest.
bitcoin is born out of a distrust with the current global economic status quo