Can you buy oxygen without an order?

In the realm of cryptocurrency and finance, there are often intricate rules and procedures that govern transactions. However, when it comes to the question of whether one can buy oxygen "without an order," it begs a curious yet perhaps unconventional inquiry. Surely, in the context of traditional markets, "buying without an order" typically refers to impulsive or unplanned purchases. But in the case of oxygen, a vital resource for life, the concept seems somewhat foreign. Is this a reference to some sort of futuristic market where oxygen is traded as a commodity? Or perhaps a metaphorical allusion to the unfettered access to essential resources? Could you elaborate on the intent and context behind this intriguing question?