I understand what you are saying completely. Although if you have ever heard of an app called acorns then you would know there is a large amount of people who love this spare change concept. Acorns also needs your bank info and then it invests your spare change into stocks. Acorns has millions of users and helped people save and earn over 25 million dollars in its second year of being released, if you want to know more about acorns check out my last post.    Coinflash is extremely secure and I can guarantee your personal info and bank info is completely save and only used to manage your change. Crypto currencies have recently blown up an insane amount and are being used just like stocks as just as much as stocks so the concept of just signing up for a website and letting it invest some change for you is loved by a lot of people. It's very easy, safe and you barely even notice this change missing from your account so it's very fun to check the website once in awhile and see that you have made some money from the crypto of your choice from doing really nothing.