DeFi or decentralized finance can threaten the world of traditional banking, because of the shift in lending, even DeFi itself is known to be able to provide loans like other traditional banks.
This can affect existing traditional banks, because there will be competition between traditional banks and crypto in general, regardless of the various problems that will occur, crypto and traditional banks must be able to adapt to each other.
Crypto development is progressing so rapidly, this can be seen from the many users who join here, if Traditional Banks close themselves it is not impossible to be abandoned in the next few years.
Although currently crypto is still very risky, it is not impossible that in the future crypto can change finances, just need to wait for regulations or legal regulations, if this happens, it is certain that crypto will grow and be accepted by many people.
Well, as long as the government never cooperate and always see crypto as a competitor to fiat, traditional banks will never allow to accept crypto or integrate crypto into their transactions. However, if crypto will be legally adopted and accepted in the future, traditional banks will never stop their operation but they will continue to serve their customers and assist them in which type of payment they are convenient to make, be it crypto or in fiat.