Tdlr: you’re still early.

Think of it. The ETFs has not yet been approved. What you are seeing now is merely the expectations increasing for an ETF approval.

Once the ETFs gets approved, it not only Grayscale. Other big institution like Black Rock will also be offering this. It will be massive. An it will probably still be traded as a risk asset, so not yet a place to allocate the majority of your treasuries. Once that happen, you will be late.