1 : current value of investment - cost of investment divided by cost of investment --> which you keep referring to
2 : the approx return on investment if purchased at the time of launch (or earliest known price) --> which coinmarketcap and other sources reference
Are those two the same type of ROI ?
Yes. They are the same.
Okay, then i was mistaken in that area. I thought coinmarketcap calculated ROI differently, and that it was therefore a different type of ROI that they just gave their own definition.