5G basically allows even faster Internet connection for mobile devices. Now, ask yourself, are people not adopting cryptocurrency because their Internet is slow? The answer is no, that thing isn't very relevant for most users, because they use light wallets, and almost no one runs full nodes on mobile devices connected to mobile networks.
Knowing that there is a lot of crypto startups that are using blockchain for various interconnectivity applications and purposes, do you think this might be a good chance for crypto to go more mainstream implementing itself with the new opportunity for decentralized data storing and thus decentralized internet of things?
IoT has a ton of problems with security, and no clear benefits - why would people want their tosters connected to the Internet? Just because they can? Just like with blockchain, there are no technological limitations that stop it from being adopted today, and yet it doesn't happen, because the technology itself is weak.