I’m not sure the thing that will enable SNT to kill bitcoin will be the advantages of SNT, but that lots of people using Safe Network for other things will become familiar with and hold SNT just to do those other things.
Whether running nodes, storing data, sending safe-mail, chatting on Decorum, posting videos… (the list is endless) all these folks will have SNT in a simple to use wallet.
Those just browsing won’t need SNT but everywhere they go will be opportunities to do stuff they might want that will require them to get SNT.
Add to this usability improvements such as a single ‘login’ for everything, ease of adoption whether running a node or just wanting to browse, and things can move very fast. Because once you have SNT and understand how to use it you’ve just jumped the biggest hurdle to bitcoin and every other cryptocurrency - and you have lots of things you can use it for as developers start making apps. Boom