This risk profile is quite like that of a traditional pension fund and the way this is achieved in TradFi is by buying downside protection in the form of put options. Unlike selling lots of ETH for stable coins to guarantee a long runway and thereby foregoing the potential ETH upside, this one-sided hedging protects the dollar value of the endowment without giving up on the upside. The option premiums could be cross-financed by selling upside calls – effectively guaranteeing the dollar value of funds stays within certain bounds – but this is not necessary.
My co-founder and I are building a protocol (greyswan.finance) which brings options on-chain with the kind of liquidity needed by DAOs like ENS. I had originally posted this thread:
but was asked to contribute here. We would be curious to hear what the community thinks about this idea?