I see that you recognize grin as primarily a great store of value. Do not get me wrong, grin is indeed a great store of value (arguably better than Bitcoin), and a such it indeed will have intrinsic value which is also requirement for its use as Digital Cash. My hope/aim for grin is simply to be sound digital cash. This requires:
to be a great store of value
good privacy for fungibility
great scalability
hoard resistance (thanks to linear emission)
On top of that Grin is very minimal and nimble in design. So no matter how I look at it, Grin is designed to be a much better fit for being sound money and digital cash than Bitcoin.
My main gripes with Bitcoin is that it mainly succeeded as as new asset class and store of value, and arguably failed as digital cash. The main problem is that few people want to spend something when they know the price will go up and up forever.
I have not given up hope on using Bitcoin as Digital Cash, but the fact that most lightning wallets are either very centralized, or you have to setup your own node and pay high costs for opening and closing channels, makes it far from a success story.
I am looking forward to the time that Grin has bottomed out, some enthusiast will open shops like Neo-Geo did and we all can start make grin payments on layer one. Since the price is either level or higher than the bottom, many more might be willing to accept grin for payment.
Sure, there might come a time that grin is also forced to use lightning channels due to high volume, but I doubt the costs for opening and closing channels will be as high they as they are now for Bitcoin. Unless Bitcoin adds some form of aggregation for openings and closings, this problem will only get worse.
Arguably I might want Grin to be less successful as a store of value and “hord coin” because it would make grin transaction costs on layer 1 too high, like it did on Bitcoin.