This online bank wants to build the AWS of fintech.At one point, $SoFi Technologies Inc.(SOFI)$ was little more than just another run-of-the-millfintech, or digital-only bank similar to privately held Chime or Current. However, SoFi made a big move in 2020 that put it on the path to becoming one of the most dominant fintechs in the world.Here's the one big reason Sofi should be on your investing radar.SoFi wants to become the leading financial services cloudSoFi took a giant step to becoming the Amazon Web Services (AWS) of fintech when it signed an agreement in April 2020 to acquire Galileo, one of the best financial services companies for building payments, checking, savings, credit, debit, and other money transfer functionality.SoFi