Bitcoin is a product of trading, investment and purchasing of goods online and making pay bills. Therefore bitcoin has been working perfectly on a digital money asset, that appreciate from time to time in time of value rate increasing by appreciate in price
I think What scares people most is that btc has no issuing authority. They feel unprotected to use it. But so far btc has proven itself tough.
In the end, everything has value because people agree so. The same applies to fiat. In reality, fiat is just a piece of paper and we all agree that it has value. The only difference between fiat and btc is who supports what.