For Roman Abramovich, that moment came when he tried to moor his £1billion yacht Eclipse - the largest in the world at 557ft long.
The Russian tycoon was beaten to the only space in the harbour big enough to moor his giant vessel, Eclipse.
Chelsea battleship: Eclipse, the world's biggest yacht, owned by Russian businessman Roman Abramovich, lies at anchor off the coast of Antibes, near Nice, south-eastern France
Saudi Prince Al-Waleed bin Talal Alsaud - whose own yacht Kingdom KR5 is a mere 265ft long - took the coveted mooring in ‘Millionaire’s Quay’ in Antibes, in the French Riviera.
Prince Al-Waleed is the world’s 26th richest man with £12.3billion, according to Forbes magazine, while Mr Abramovich is 53rd with a fortune of £8.4billion.
Holiday on the Med: Russian billionaire Roman Abramovich and girlfriend Dasha Zhukova
The last space in Europe’s biggest yachting harbour simply wasn’t big enough for the two superyachts.
So the Chelsea FC owner was left with little option but to drop anchor several hundred feet out at sea - and then travel to his villa on the shore by motorboat.
Mr Abramovich’s crew had pleaded to be allowed to moor in the harbour, but were told it would be impossible to ‘squeeze Eclipse in’ as it was ‘far too big’.
‘Mr Abramovich has a villa in the town, and is, of course, always welcome to disembark with his family, but with a yacht this size it was not possible,’ a source at the port said yesterday.
‘Instead Eclipse had to be sailed out to sea and left there.’
Mr Abramovich, 41, who has six children with his first wife Irina and girlfriend Daria Zhukova, often uses his fleet of luxury boats to ferry his family up and down the Mediterranean.
But none has ever compared to Eclipse, which has two swimming pools, two helicopter pads, a dedicated disco hall, around 30 cabins, a mini-submarine, and even a missile defence system.
Inconvenient: Eclipse is too large to fit in next to all the other tycoons' boats moored in Antibes, said port authorities
People carrier: Mr Abramovich often uses his fleet of yachts to ferry his family, including his six children, up and down the Mediterranean
Luxury: Eclipse had an initial order cost of £300million, but this rose to nearly £1billion after all the fixtures and fittings Mr Abramovich wanted were added to the boat
This port ain't big enough for the both of us: The super yacht of Saudi Prince Al-Waleed bin Talal Alsaud was already moored in Antibes preventing Abramovich from parking his vessel
It also has armour-plating around Abramovich’s master suite, bullet-proof windows and a laser system designed to dazzle long-lens photographers.
Fabulous wealth: Saudi Prince Al-Waleed bin Talal Alsaud
When it was ordered the initial cost was estimated at around £330million, but by the time Mr Abramovich took delivery last year it was spiralling towards the £1billion mark because of the extra luxury fittings and security measures.
Prince Al-Waleed’s vessel, though smaller, has a fascinating history of its own.
The boat, which can carry 22 passengers and 31 crew, was built in 1980 and bought by Saudi billionaire, Adnan Khashoggi under the name Nabila.
It featured in the 1983 James Bond film Never Say Never Again – as ‘The Flying Saucer’ – owned by villain Maximilian Largo.
Its other owners have included Donald Trump, who named it the Trump Princess.
Prince Al-Waleed bought the yacht in 1991, and renamed it Kingdom 5KR after his investment company Kingdom Holdings, his lucky number 5 and the initials of two of his children.
The prince is the owner of the Savoy hotel in London, and his investment company plans to finance the construction of the world’s tallest building - the Kingdom Tower - in Saudi Arabia.
Antibes is the largest yachting harbour in Europe with more than 2,000 moorings - but only one spot big enough for Eclipse.
Mr Abramovich had applied to Antibes council three years ago to build his own pontoon at the villa, but the plans were rejected.
A spokesman for the Antibes International Yacht Club said: ‘The only space where it could fit is already taken, though there are plans to build another large berth in the coming coming years.’
Eclipse was built by the Blohm and Voss shipyard in Hamburg, Germany, and delivered to Abramovich last December.
The oligarch also owns three other mega-yachts, the Pelorus (377ft), the Ecstasea (282ft) and the Sussurro (161ft).
Abramovich once lent the Pelorus to Chelsea footballers Frank Lampard and John Terry as a ‘bonus’ for playing well.
Annual running costs for his fleet are around £16million including full tanks of petrol at around £70,000 per yacht.