[Traster]

This really isn't correct at all. Firstly, ETrade is probably not planning on significantly growing its engineering force for one project, so it's likely that spending time on a Crypto exchange is going to involve significant opportunity cost taking other projects off their roadmap. Secondly, they don't need positive ROI, they need to keep their margin, so they probably need a 2x ROI minimum, I don't know what the normal margin in their business is. Thirdly, crypto has significant risks that aren't just ROI. You need to think about the increase in KYC checks and the likelihood of market manipulation reflecting poorly on ETrade as a platform.