There is no fiat currency to compare because bitcoin is much more than fiat currency. If you know what is bitcoin, blockchain then you will trust on bitcoin is more secure and global currency.if you asking me about future of bitcoin like ? Then its more valuable , secure and limited than other fiat currency. Bitcoin is 1st global blockchain based decentralized currency and people are started accepting all around the world and that is the power of currency. Its future is bright like any other country currency. I will say here its more valuable than any other currency.