A product that doesn’t exist yet that I might just have to build: enabling people to hold self-custodied staked ETH in a tax efficient account (401k, IRA).

I think this does exist in a number of ways

I *want to build* a similar product: a trust that enables you to donate crypto without paying taxes on appreciation, with a full deduction 

It's a major business for public and private equities

Building. Prior: VP at Adobe, GM of Behance, co-founder of the Content Authenticity Initiative, early days at TED. https://williamallen.com

challenge/opportunity with these is that they just let you buy & hold a specific token or coin: you can't stake or do anything else with them. Or trade on uniswap. IMO there isn't much of a tax advantage to just holding BTC or ETH in a IRA.

I think this does exist in a number of ways

I *want to build* a similar product: a trust that enables you to donate crypto without paying taxes on appreciation, with a full deduction 

It's a major business for public and private equities

https://www.irafinancialgroup.com/learn-more/self-directed-ira/crypto-ira/