The main weakness of Bitcoin is that Bitcoin cannot be used without an Internet network, whereas people will not transact with the Internet forever. That means Fiat has the advantage in this matter, Bitcoin does have an advantage because the price can go up quickly, but on the other hand, the price can go down very quickly too. In my personal view, Bitcoin is more suitable for investment or trading because in this way Bitcoin owners can quickly get profits. And for buying and selling tools, goods and services, I think with FIAT everything can be done easily.