I have just been comparing the various digital cash systems. PayPal has the lock really. Other than serve, which is not really a payment system, PayPal is the only one that has a linked debit/cash card, meaning you can spend it right then. Stripe, square(both parts), skrill, all these require a 3 day wait for a bank transfer unless you pay it out through some other account. I love Bitcoin, but the digital guys need to catch up to PayPal. Plus, some nice intersection of all the types would be useful but near impossible. I have PP, you have Square Pay, with some website or app that allows for pretty smooth transfers from one to the other. Then the government can really shit about money laundering.
Coinbase has been in league with paypal for a couple of weeks now and it is only a matter of time before they integrate a system so they can both benefit from.
Because of all the charge backs that have been happening as a result of buying bitcoin with paypal funds, they finally notice that they are the ones who are on the losing end of the stick when it comes to dealing with bitcoin if they don't do something about it now before it gets worst for them.