I'm not personally opposed to it actually but A) does it actually work? B) until people can pay rent in arbitrary coins it very much relies on mining the "right" coin to be able to get any useful USD, SEK, ZAR... Whatever out of it. C) because A is reliant on the cost of mining and established crypto-asset-ma-bobs are expensive to mine trying to get value off the small amount of cpu you can grab via JavaScript mining it incentives ScamCoins.