As bitcoin is a new technology, it is still a fresh concept to most of us. We don't know more about it yet, so we couldn't fully put our full confidence on it as well as to other cryptocurrencies existing in the market. Cash is better than bitcoin because we can hold it, we can touch it and we can spend it without going through the hassle of using our mobile phones and connecting to the internet. Most of all, we are already used to cash than bitcoin.
I don't really think your argument of fiat money being tangible and being able to be used offline is really a strong argument in this case; most of the world's money in the current day and age isn't physical, it's all digital. in any case, i rarely find myself using cash for my purchases these days, i mostly use digital payment processors, or a credit / debit card. my cards, paypal, bank transfers, all would not work without some sort of connection, and i would think its fair to say that this applies to most other people as well. in any case, cash could be less secure than bitcoin; anyone can walk off with your bills that you left lying around accidentally, but the same couldnt really be said of bitcoin.
for me, Bitcoin is better than Cash because of its high price value and profitability.
cash is used only for the conventional activities but Bitcoin is being used for saving and investment purpose. it has been established as a most profitable platform for doing a trade. so in terms of profit cash is not better than Bitcoin.
Many people do not know bitcoin they don't also know any crypto currency. Therefore they consider it as scam and I don't blame them. They need information and education. If they are old enough it's difficult to make them change the usual way they transact, that is fiat money. It is unrealistic to believe that all people will accept it as payment system.
that, and they need to be informed that bitcoin isnt just used by criminals and gangs; from multiple people i've talked to that have had an awareness of bitcoin, they've had a negative perception of it from all the silk road / internet ransom / blackmail cases that surface in mainstream news. if we could get past that and inform them on how it could be the beginning of a financial revolution, i think we could see some real headway on widespread adoption.
