When bitcoin fails (and it will), those who mine will be the first to move their value out to whatever BitCoin2.0 is. Then they will be able to charge whatever they want to the suckers left who want to exit, because you literally will have to pay the miners transaction fees to let you do this, and there will be no cap on what they can charge.
The final appeal will be to the government, saying "you bailed out the banks, homeowners, students, the auto industry, the airline industry, why not those who lost money in bitcoin?"
We can't look at Bitcoin as a purely economical issue. There are a lot of facets that need to be understood.
DeFi COULD be useful for people in under-developed or generally economically limited countries but I believe that the implementation needs to go back to phase-0 and solve many of the speculative issues that are inherent in DeFi today.
So you would be against crypto getting bailed out by the government?