I have been running an eBay and Amazon business for 3 years now and have earned around £3500 in revenue and £1500 in profit. I am hoping to study Economics at Cambridge in 2018. Would it be worthwhile to put this in my application or is it not that relevant. I am interested in banking - mostly stocks and investment after university. I have dabbled a bit in stocks and earned a couple hundreds but also lost lots of money, is this also worthwhile to mention in an application or is it unrelated or excess.
... and the ones that won't