I think it is difficult to answer because both are growing strongly over the internet. Paypal is a company active in the field of electronic commerce, specializing in providing payment services and money transfer via the Internet. It was founded in December 1998 with the original name was Confinity, a company developing security software for handheld devices, existed and developed until now. And Bitcoin is a digital currency, electricity, its decentralized nature, is encrypted and was born in 2008. After nearly 10 years of development, the value of Bitcoin has been continuously increasing and are gradually popular with everybody. I think both can survive longer on the internet because their features are very useful.