Jason Oxlee, a 44-year-old site manager from New Farnley, is testing the patience of his family, after his 150-strong vintage trainer collection has left their four-bedroom house bursting at the seams.
He told the Sun he spends an impressive £100 a month on his collection, but insists that it's not a waste of money, and will actually constitute an investment - which he plans to hand down to his son (assuming he ends up a size nine).
His wife, Faye (36) and three children (Ellis (9), Maisie (7) and Alyssia (3)) have been falling over trainers stacked all over the house.
Jason has suggested the two girls move into a shared bedroom in order to make room for his trainers, but his wife joked to the Yorkshire Post that if he carried on at this rate there would be plenty of room for the trainers, because she'd move out.
Is it an investment?
Jason hasn't just been picking up any old trainers. He's always on the look out for limited editions and new releases, and estimates the resale value of his collection is around £15,000. He does wear them, but tries to keep them clean, and always washes them with sugar soap after wearing.
Some pairs of trainers have proven surprisingly good investments over the years. There are two types of investors. The first will snap up desirable limited editions in popular sizes, wait a few days or weeks until they have sold out, and sell them on eBay. 'Flipping' shoes can make the dedicated investor thousands of pounds a year. If you know enough about trainers, and what constitutes a desirable pair, then it's not terribly difficult to make at least a small profit with this approach.
The second type will buy especially desirable iconic brands, and time their sale for when they are particularly fashionable. This is something that only the specialists should consider.
Unfortunately for Jason, there are three things that ring alarm bells in his story. The first is that he is collecting Adidas, when it's Nike with the most investment potential.
The second is that he is wearing his trainers - which makes them used items and reduces the resale value dramatically. Finally, the third problem is that he plans to hang onto them for life, and give them to his son to sell. Unfortunately, by then, there's every chance the fabric would have deteriorated to the point that they are worthless.
But who knows? Maybe Jason has actually snapped up a couple of perfect, pristine Yeezy 750 Boost trainers (the most valuable collaboration between Kanye West and Adidas so far), which at the moment are worth more than $1,000. If he sold those on, his collection wouldn't seem like such a daft idea after all.
Trainer collection taking over: wife jokes 'It's me or the trainers!'
Fine wine is one of the best-performing asset classes of the last 20 years, and prices are still going up as demand from China hits new highs - particularly at the top end of the red wine market.
However, there are no guarantees that this trend will continue, and the experts recommend that nobody goes anywhere near wine as an investment unless they can afford to lose a substantial proportion of their money - or if they would be happy drinking their losses.
They highlight that in 2008 and 2011, the market saw some serious slips - in fact in 2011 it fell 30% - so it’s important to be alive to the risks
We’re used to the idea of the value of cars falling over time, but desirable classic cars can actually gain in value. The most desirable handful of cars have seen their value double in the past four years, while even the kinds of classics that most people can afford are increasing in value by anything up to 20% a year.
However, as with all of these alternative investments, this isn’t guaranteed to continue in the future, so you should never invest what you cannot afford to lose.
Buyers also need to bear in mind that unless they are keeping the car in mint condition in a garage, they need to pay to keep it on the road - which can easily cost £1,000 a year - more if something big goes wrong.
Some owners think of this as the price they pay for the hobby of owning the car - quite aside from the investment - but if you consider the two together, it’s easy to see how even if the car itself increases in value, you’ll end up paying out more than you gain.
According to Knight Frank, antique furniture has had the worst run of all of the luxury investments. Prices fell 8% last year, and are down 22% in five years and 24% in ten.
This is partly because older antique furniture is falling out of fashion. As a result, more fashionable early and mid 20th century pieces have done better, and are up 29% in ten years.
Passing fashions make this a particularly volatile investment, so in this case more than any other, investors should buy things because they want to see them in their home - with the handy side-effect of a potential increase in value if they buy something iconic and unusual.
And while they should buy the best they can afford, they need to ensure they do not spend more than they can lose - or choose to keep in the lounge if the bottom falls out of the market.
Investing in rare coins is one of the most buoyant parts of the alternative market at the moment - with values up 10% in a year, 90% over five years, and 221% over ten years. However, this is definitely an area for experts, because unless you know what you are doing it’s easy to be taken in by counterfeits, doctored coins, and dealers who encourage you to spend more than the coin is worth.
Most people tend to start collecting coins as a hobby, investing to own something they love, hoping they will see some gains, but willing to take a loss on their collection if they ever had to sell. With this sort of approach, the big gains are likely to be well beyond your reach, as they are focused on the top end of the market. However, it should protect you from unaffordable losses if the value of your collection drops.