This kind of topic really never gets old. It still pulls my interest no matter how predictable the answer would be or the views of most of the people who indulge in a conversation regarding this topic. What I like about this post though is that it is made easier to understand for dummies like myself. My opinion about this still stays the same as always though; that bitcoin will be very difficult to use as a day to day currency similar to fiat. That's just how I see it. dogecoin is a good candidate though, although I don't know if others would agree.
Edit: I liked the post so I'll be giving a merit. Hope to see the continuations of this topic soon.
You seem to refer to technical issues of Bitcoin. It will be difficult due to drastically inferior user experience, as Bitcoin is obviously not up to the task to compete with conventional payment infrastructure on the consumer level. Solving all technical issues takes a great effort and i've been racking my brain for quite a long time trying to develop a solution to all problems simultaneously.
The truth is, however, that even leaving all technical issues aside, Bitcoin cannot reach the initial goal due to the inherent problems of its economic model, which we are discussing in this thread.