Also, lack of awareness and education about the use of cryptocurrency is another reason why people will always choose cash. Lots of people are still clueless about how cryptocurrency works and how they could use it. Normal people still prefer cash because it's acceptable in all forms of businesses and different transactions.
But for how long? Cash won't always be an option. Loads of governments are looking at phasing cash out. There will come a time where you don't have a choice. It'll either be Bitcoin or some centralised digital gov-coin.
Really hard to believe on as long government do see its relevance then it would surely stay no matter what.We might have go through digital-fiat or transactions but cant really be denied that fiat do still
play a big role when it comes to day to day transactions which cant really be done via online transactions which they might be having that reconsideration in regarding the situation on why we cant really
be having that full switch up.
But you do actually have the point about cash/fiat but lets just presume for now and as for Bitcoin worldwide adoption then it would really just come down naturally.