If you are investing that kind of cash you should be using Coinbase's GDAX exchange not their brokerage service. If you place limit orders on GDAX with the "po

If you are investing that kind of cash you should be using Coinbase's GDAX exchange not their brokerage service. If you place limit orders on GDAX with the "post only" option checked you will be able to buy coins with zero fees. Other exchanges have similar fee structures so if you don't want to pay the 1% brokerage fee you really need to learn how to use limit orders regardless of what exchange you ultimately use.