I subscribe to a lot of BookTube channels and one very common video type is the monthly book haul where the youtuber presents the viewers with all the books they have bought during the previous month. Somehow all these tubers manage to buy sometimes dozens of books in one month, which just blows my mind and also irritates me a little bit. It makes the BookTube feel a bit shallow when a tuber buys three versions of the same book. How can they even afford all those books? Books are not cheap!
I myself buy books quite rarely because I'm a student and don't have too much extra money to throw away. Luckily, I'm fortunate to live in Finland where the library system is magnificent and they get even the newest books pretty quickly, including international books that have not been translated or even sold in Finland. I've grown up with library and I love it, it saves me big bucks both in terms of text books and fictional books.
Books that I buy are a sure thing, meaning that I know that I will read them more than once. I wouldn't buy a book without knowing that I like it. Usually I've already read the books I buy and I buy them as a collector, hardback always. Currently I'm trying to track down the version of the Hobbit with Tove Jansson's illustrations (the Finnish translation) and also the Finnish translation of the Night Circus. Both I have read and both I will read again. Only Harry Potter related books are an auto-buy for me, I have just recently acquired all the seven books in English, after owning them all in Finnish for years.