Bitcoin can't defeat them for numerous reasons such as mining centralizing via economy of scale where you need to be a corporation-level entity to participate at all.  Bitcoin will be ruled by oligarchs with the last name "Goldstein" just like every other financial product on earth.  Attempting to remove the economy of scale aspect usually opens you up to Sybil attack.  To actually make bitcoin decentralized, you would have to use more advanced cryptography and invent decentralized captchas or puzzles where users manually solve them by hand instead of oligarchs creating giant, automated farms where they rule over bitcoin as slumlords, rigging the fee markets and siphoning off all the transaction fees until they own them all, maintaining their slavery over you.

In other words, it's EXTREMELY difficult for Bitcoin to make a real positive impact on the financial world in current form.  The only real decentralized currencies on earth known to man are using the noble metals as currency in physical form (not "backed" paper).  Of the noble metals, only two qualify for use as currency:  gold and silver.  Of those two contestants, "they" have already cornered one of them - gold, leaving you with silver as the only real decentralized currency on earth in the current state of affairs.  Although JP Morgan supposedly owns more silver than the Hunt Brothers did now - 550 million ounces ($10 billion).