Invest in energy, manufacturing, and education (ie. your own people) for 75 years and people will look for a trick card up your sleeve and accuse you of cheating when your 7th of the world population has a 7th of the world's genius
I have a Quest 3 and I think I've only opened Horizon Worlds once. It's a very small part of the overall offering. If you can find a used headset for $200, it's a no brainer buy
The post was referring to Bitcoin-based cryptocurrencies which compute addresses using two hashing fictions, RIPEMD160 and SHA256. It's not just the same hash, twice. The PoW for blocks is SHA256(SHA256()), though