I'm 17, entering my final year of high school in the fall. I worked a bunch this summer and have roughly $2500. With this cash I could: 1) Invest in stocks- I'd buy a decent book on investing and educate myself first, and then buy into the stock market. 2) Save for university - After my third year of (Canadian) university, I am responsible for paying tuition+books. Given that I plan on pursuing a Ph.D, I'm going to need as much $ as possible down the road. On top of this I will have small personal expenses throughout my university years (maybe $100 a month) 3) Buy a telescope- I love astronomy and have always wanted a telescope I have no clue! I know it's hard to say for you, as you don't know me personally, but do you have any advise?