В Пропи вложился Тим Дрейпер.

TechCrunch: Propy, a blockchain-verified platform for selling houses, raises funding from Tim Draper:
https://techcrunch.com/2020/10/02/propy-a-blockchain-verified-platform-for-selling-houses-raises-funding-from-tim-draper/

В русском переводе: https://kolibri.press/71236