Nice try fed. 🤣

But seriously, I'm actually using Blockstream's Green ¹.

I don't have huge amounts of sats there. Still, I found it very convenient to stack sats through lightning using Green -> when the amount there gets big enough I temporarily migrate to Liquid (also on Green) -> finally when on-chain fees make sense, I consolidate by pegging out to "real" Bitcoin (in a multi sig setup outside Green).