I dont think any thing big that i can buy with bitcoins because i dont have alot of bitcoins to buy any thing that expensive i only wish one day i could use my bitcoins in my daily life more often even in the real life in the offline stores in my country,thats my only wish to buy with bitcoin for now.
But you should have hope as time goes on you get to make good money from bitcoin, by then you can use the money buy whatever thing you needed. In as much as you are hardworking and not lazy you will have a brighter future.