I think as important and integral as self custody is, the hyperbitcoinized future will most likely rhyme with current times. The masses are simple and want the path of least resistance, such as a “custodian” to store their funds. You can lead a horse to water…
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The least resistive path doesn't have to be custodial though. We just need non-custodial to be easier and seamless. People should not even know what these terms mean. Technology should fade into the background.
100% tech should be transparent to the average person, just a great easy user experience