They say money can't buy happiness, and there is no denying that it's true. But money can buy things which brings a strange pleasure to those who seek it. Be it for the happiness of our family, or personal satisfaction, we sometimes don't mind spending money on things that do not make sense but bring us pleasure.

However, while most of us can only afford to spend our hard-earned money on senseless stuff only once in a while when the temptation becomes too difficult to ignore, the billionaires of this world do not have such obligations.

Given the amount of money that sits in their bank accounts, they can choose to spend their millions and billions in the most unnecessary and senseless ways, without giving it a second thought.

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A few hours ago, news broke that the world's richest man Jeff Bezos spent rupees 1.25 crore on bulletproof panels for his Seattle office. The inch-and-a-half thick fibreglass panels were chosen because they can reportedly withstand shots from military assault rifles. What's more, it is being said that Amazon spends over 11 crore rupees on Bezos' security annually.

Now, we understand that the man needs protection, but that's a whole lot of money to spend on an individual's personal security. But this isn't all, we list down 5 other world billionaires who decided to go ahead and spend their money in even stranger ways.

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Bill Gates is a great admirer of Leonardo da Vinci and maybe that is the only explanation as to why he chose to spend over 30 million dollars on the old man's journal. Back in 1994, Microsoft founder Gates spent 30.8 million dollars to gain the ownership of the Codex Leicester. It is a 72-page manuscript compiled by da Vinci compiled in the early 16th century and features the master polymath's diagrams, writings, sketches and ideas for future inventions.

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India's richest man and industrial magnate, Mukesh Ambani owns more money than we can count. With a net worth of 5,530 crore dollars, he sure built a house that speaks money. Mukesh Ambani spend 1 billion dollars to build the most expensive home in the world! A 27-storey skyscraper that stretches across 400,000-square-foot, it comes with a helipad and six-level underground parking. What's more, reportedly it also has a ballroom, a 50-seat theatre and nine elevators in the lobby alone, and requires around 600 staff to maintain the place. And all that for a family of six, that stays in the mansion at a given time.

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A well-known Swiss socialite, Wildenstein always waded in money. However, things only got bigger and crazier after she received 2.5 billion dollars as a divorce settlement. Wildenstein, who is now in her late 70s, had been spending millions, almost excessively and obsessively, on plastic surgery. According to a Mirror report, Wildenstein has spent over 27 crores on her decade-long surgeries.

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Tesla and SpaceX founder, Elon Musk is known for his eccentricity. For the man whose brain led to the inception of the Hyperloop tunnel, it only makes sense that he fancies “different” methods of personal transportation. Back in 2013, Musk acquired the Lotus Esprit submarine car of James Bond's glory, from 'The Spy Who Loved Me' and reportedly, he had to cough out almost 1 million dollars for the car which was found in a storage shed of a junk collector.

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Known as the infamous Sultan of Brunei, Bolkiah probably got the most expensive haircut in the world. Reportedly, the Sultan flies in a barber from London and pays him around 19,000 US dollars for a single haircut. Not only that, but the Sultan also takes care of the barber's accommodation and other requirements. That's some kind of job to have, no?