Ristretto adds complexity over just using secp256k1, which also has very good Rust support, is quite fast and well-optimized, compiles to WASM, and supports ECDSA, ECDH, and Schnorr key aggregation, so it's quite full-featured.
Funny timing that this particular topic made it to HN. From the recently-released Season 4 of The Dragon Prince, this is one of the reasons Claudia is so infatuated with Terry, an Earthblood elf.
If the unit cost is higher than the maximum a manufacturer or retailer can charge, it won't be produced at all. This results in a market failure, similar to the one China's experiencing with their energy market, where the price of coal is 4x what it was earlier this year.
Seems to be trending downward... Who knows if it'll be enough.
I was curious if a similar downward trend existed for solar panels...
"In 1956, solar panels cost roughly $300 per watt. By 1975, that figure had dropped to just over $100 a watt. Today, a solar panel can cost as little as $0.50 a watt."
So, that's a factor of 600 to get to present costs. Gold currently costs $56,500 per kg. So, $33,900,000/kg. So, who knows where we could be in 50-70 years. Plenty of time to switch the entire global economy to Bitcoin, I suppose!