I think you are trying to say that bitcoin will fail to become a mainstream currency because 60% of the world population don't have access to the computer. If I am understanding you correctly, then let me assure you that bitcoin is not structurally built and fit for becoming a mainstream currency in any way. It is an experimental virtual currency which implemented the idea of a decentralized currency successfully for the first time through blockchain technology. It is not trying to become a mainstream one.
So bitcoin will always be used by those with a certain level of technological expertise and not by any common people. Even though the process for bitcoin payment has been made very simpler by many third party wallet provider, but majority of the governments will not want to allow bitcoin to mingle with their own centralized currency system. It is and will always remain as a digital currency and an excellent store of value.
The opposite of failure is success, From the introduction of blockchain technology that brought bitcoin to the public, it has been providing remarkable success to its investor, and companies that are accepting this innovation. Its been beneficial, even there are some small negative issues related to government control and regularities. The remaining 40 percent of computer accessible population is more than enough to establish the success of bitcoin, considering that computerization is the main target of technological progress of any country.