1st thought: robust proposal, I generally support this course of action.
Have you considered $2.5m into stables (ideally generating some yield) and $2.5m into more liquid and less volatile crypto assets like BTC?
GTC is listed on Coinbase but it is Binance that is responsible for 50% of the overal volume, screenshot from Coingecko:
I know too little about Gitcoin legal structure and availability of the Binance in the US.
Not sure if I should comment here or the orginal thread (or both): [TEMP CHECK] SGTM 000 - Treasury Management Strategy for Gitcoin - V1