Public chain with 'Bitcoin or ETH'(which price will keep going high) can support its ecosystem business going scale, Clearly the costs to the DAPP developer and the customers is going high along with.
Maybe every public chain without a stable coin will vanish eventually. Any ideas my friend?
This idea seems to presuppose a couple of things. #1 is that Bitcoin's main purpose is being money. While this idea is attractive, we have to take into account that in reality, it's not really the case. Many people keep holding Bitcoin, hoping that one day it will cost way more. Another category lives off the price volatility (traders). I bet these two categories would not consider that only stable coins should survive. #2 is that volatility is the biggest hindrance to Bitcoin adoption by retailers. While it's a big problem, I think that scalability is a bigger one. And then there's another thing a coin loses by being a stable coin (apart from decentralization, because it's been mentioned and you've answered to that), which is resistance to inflation.