Is it safe to go out late in Vietnam?

Is it safe to go out late in Vietnam? Vietnam is a pretty safe place, but going out late is not a good idea, especially alone. Though serious crime against foreigners is rare, pick-pocketing and purse-snatching has increased in recent years. Like any where else, it is always wise to be cautious especially when you are in a crowded place. Is it safe to go out late in Vietnam?