Electric vehicles (EVs) are expected to account for two-thirds of global auto sales by 2030. With such significant growth, manufacturers are competing to stake their claim and grab market share.One of these hopeful competitors is Rivian Automotive (RIVN -6.00%), an up-and-coming start-up looking to fill a missing gap in the EV market with its SUVs and trucks. But if you are looking for a boost to your portfolio, this might not be the stock for you. Cash continues to bleed, with nonexistent profitsEvery EV m ...