True, but the spread at GDAX BTC/USD frequently hovers around $0.01, and within $0.05 of the price there'll be 10's of bitcoin available. A quick check right n

True, but the spread at GDAX BTC/USD frequently hovers around $0.01, and within $0.05 of the price there'll be 10's of bitcoin available. A quick check right now had 5.2 BTC (~$86k) on either side of the $0.01 spread. Slippage has plummeted as exchange volume has gone up.