if router is from other people, don't enter this network, u have no control. Likely they will see your computer in network and try to enter.

trust me, to access your computer and look around in computer by wireless router is difficult task for average joe. as long u don't left your bank information open. though I am 18 and haven't do bank and tax stuff yet and not any soon. But I am sure that some people has good information for software that do such thing. also I understand that Bank use secured website (how it work? Idk b/c of my age) so it won't got stored in your Hard drive. My parent keep track by Microsoft Excel. (make sure that your excel database are well hidden or keep it in Flashdrive in Safe)