In my opinion, the main weakness of Bitcoin is the limited internet service. because bitcoin can only be accessed using the internet network. and we all know only developed countries where almost all of the population can access the internet. whereas in third countries only 50% of the population has access to the internet. but I am optimistic that over time the internet network will expand. and bitcoin will be a revolutionary currency that is very suitable for us to use in a digital era like this.
It's not something that cannot be solved though. Bitcoin does not necessarily need an active internet connection, there are several workarounds for that. There are quite a few people who've worked on keeping Bitcoin active even in the event of EMPs or full internet shutdowns. The main issue with this is, you'd need special equipment.
For areas or population without internet access, there are some other larger issues they'll have to confront soon such as the slow disappearance of cash. At one point, they'll have to go digital anyway. It's the dream of our current world's governments. The more digital, the more control so the happier they are.