Among your current hobbies, which one is the most expensive?

Men's favorite hobby? Some people say it's smoking and drinking, especially those expensive cigars and expensive wine. Some people say this is a beautiful car. I think it is disrespectful to include beautiful women in hobbies and should not be discussed too much. Speaking of super-running luxury cars, it is indeed a very expensive hobby. Others say it's a house. Luxury houses all over the world can't be bought at all costs. But what about the most expensive? In fact, I thought it must be to buy those "useless" things. The more "useless", the more difficult it is to get a moment of satisfaction. After having one thing, you will soon aim at the next goal. This is burning money. Most famous cars can be driven when they are bought, and they won't get bored immediately for a while. Similarly, houses are used for living. Wine is used for drinking and cigars are used for smoking ... But if there is some use value, it is not so easy to burn money, which requires a consumption process. Only the useless hobby of "collecting" is the most terrible bottomless pit. I'm a clock lover. I thought those priceless clocks were already burning money. For example, Patek Philippe sold 6.2 million Swiss francs at the OnlyWatch auction in 5209T and 7.3 million Swiss francs at 50 16A. For example, at the Foys auction, PNPN's Rolex sold for more than one billion RMB ... Patek Philippe launched a limited number of 30 sets of enamel Geneva Lake Water World watches on the anniversary of175th, and the price was only several hundred thousand Swiss francs, but it would take three years.