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I think it's not even a stable coin that's necessary as major adoption will eventually lead to more stable prices, just like in forex, less jumpy and therefore more reliable.

But like you say some mainstream friendly front ends, which are easy to use and secure as well will in the end do the trick. They definitely have to be available as mobile apps though.

It's a chicken and egg thing. Sure if we get mainstream adopted then we get stability....but I think we need stability before we get mainstream adoption.