Generally speaking, regulation is most easily dealt with by the market leader. They have capital that can be used to meet requirements, and can engage with regulators to make sure the regulation can be achieved by them.
That actually improves the situation for them. (Similar to how GPDR improved Google and Facebook's position in the ad market against competitors)
Did you read what you were replying to? Regulations elsewhere in the market could threaten Coinbase, regardless of their ability to handle compliance costs in their own niche. In their own filing Coinbase admitted that the value of their company is highly correlated with the value of Bitcoin and other cryptocurrency -- so any regulation that impacts Bitcoin will likely impact Coinbase, even if the impact is indirect.
That actually improves the situation for them. (Similar to how GPDR improved Google and Facebook's position in the ad market against competitors)