These debit cards let your child learn how to manage money while still giving you plenty of oversight and control.

Admittedly, it would be a bit more of a stretch to see SoFi ( SOFI 2.84%) reach Bank of America's valuation. Even in a 15-year time frame, this would require 22.5% annualized returns.

Enter prepaid cards – virtual payment options that let you spend securely without linking to your bank account. Some skeptics ...