From many months i am thinking about what if " we remove fiat system , and change things into crypto " .. What are the main difficulties we will face ?
1. Internet every where is not yet done.
2. Awareness with Crypto ( but its not a big thing, as most are aware of how to use currency. )
3. Bitcoin is only 21,000,000 and world population is more. ( This can fix by other altcoins same like USD/RUB/CNY etc )
What other difficulties we can face ?
But those difficulties are only going to be true if you tried to replace fiat with bitcoin right now, as technology becomes cheaper and more accessible people will begin to adopt bitcoin slowly, in the future when the Internet becomes available in a similar way than water and electricity then we will begin to see bitcoin used by all kind of people, to me the biggest problem that needs to be solved asap is the transaction fees everything else can be solved with time.
Yeah, and since that does not even look feasible from the angle we are now, it may not really pose to be a huge challenge. Fiat is still going to be very usable and only few of those who willingly want to use bitcoin would end up using it as long as they do not have any restriction doing so.
Nothing comes pretty fast just as you said, adoption happens slowly and to me bitcoin is even pretty fast than we could all have imagined within just few years, but we should expect the fiat system to keep on going for now.