IPv5, IPv6, IPv7, IPv8 and IPv9 are making IPv4 pointless just like all the possible other digital currencies are making bitcoin pointless. I guess that's technically unfair since IPv4 does have to be replaced and look how quickly people are doing that.
The first widely adopted protocol is very, very, very hard to replace. Take IPv4, SMTP, FTP and Telnet as examples. All of them need replaced but they are still used and relied on all over the world.
Which is why bitcoin is finding it so hard to make inroads; people already have what they consider to be "digital currency". I buy stuff from all over the world (and hopefully will sell to all over the world as well) without using cash, just sending bits of information over a computer network. For the man on the street the difference between doing a money transfer and sending bitcoins is that bitcoins are untrustworthy, he can't use them without a currency exchange and the price fluctuates.
Back to your analogy: EFT is the IPv4, bitcoin is the IPv9, and there is no need to move to IPv9 if IPv4 works. If it turns out *really* borked, we'll move to IPv6 instead.