What i guess isnt the question,but who is stoppling trying to block bitcoin.Companies like paypal,visa and mastercard has a lot to loose if bitcoin gets everywhere,they will loose their costumers very fast,a huge part of them not all,as the oldest may not dropp them.Soo they are in a buble trying to keep and make bitcoin unknow to the most,but well the buble is getting bigger,soo the way to fight is attack saying its is a good thing to black market and many others things,rumors to make bitcoin not grow.
Why cannot visa or paypal integrate bitcoin into their payment system? Bitcoin is just another kind of money. It can be used cheaply by the credit companies.
To be honest, no one would want this to happen. There are actually services which allows offchain payments and it would let a third party to gain control over your coins. It would defeat the purpose of Bitcoin which is to provide anonymity and not let a third party to control your coins. They are designed to allow customers to chargeback if needed and Bitcoin by nature doesn't allow that.