The biggest mistake Virgos make when signing contracts...
Virgo needs to understand everything, due to your Mercury ruler. If you can wrap your mind around all the details of something, you can usually learn to understand it as a whole.
This comes in super handy when it comes to handling the money you earn. While others are content to spend on big purchases, you're a little more practical by nature.
Reading the fine print on everything you sign, from a contract with your bank to any loans you take out, gives you a real advantage over other signs. You're patient with your cash, and this means you can enjoy it for a very long time.
P.S.: This is 100x more true during Mercury retrograde!