These days we have monster trucks, monster homes and monster food portions in restaurants ( a trip to Florida will provide plenty of evidence of the latter ), so I suppose monster prints fit the trend as well.
Maybe this is just an American perspective. The distant history of life in America was that of the native Indian tribes who lived in modest huts or wigwams, even the chieftains apparently.
Elsewhere, in Europe, India and China, the monster homes were much bigger and grander than the homes of most billionaires today. They were true palaces employing hundred of servants, guards, gardeners and maintenance people on a permanent basis.
Regarding monster trucks, they are probably not as monstrous as a caravan of 20,000, or 10,000 or even 1,000 camels. It was customary to connect strings of 40 camels with a rope that passed through the nose-ring of each camel and attached to the saddle of the camel in front. Often 3 or 4 strings of 40 camels would travel abreast. If the road wasn't wide enough the caravans would travel in one long line, like the biggest most monstrous snake ever.
Monster food portions in restaurants tend to be more of an American phenomenon, hence the obesity epidemic. However, some of the ancient Romans, the wealthy ones, probably beat the Americans in this respect. Some of them actually vomited so they could continue eating, although the term 'vomitorium' has been mistranslated. It's really just an exit where crowds can 'spew forth' from a show.
In general, large prints tend to be more appropriate for certain subjects, such as grand and magnificent landscapes. A 5ft x 6ft print of a macro shot of a spider, on one's living room wall, might be subject to criticism. It might appear a bit monstrous.
