My favorite public blockchain project is the Ethereum project.

It is a proven block-chain for which it is the key base protocol for the majority of the ICO projects.

GP Bullhound performed a comparison study of Ethereum, Waves, Bitcoin and Neo from 2015 to 2017; ICO projects on Ethereum is about 90% by number of projects and 96% by volume denominated in USD.

Reference:
201805_GP Bullhound Research - Cryptocurrencies – 2018
https://cdn2.hubspot.net/hubfs/4119751/GPB%20Research%20Reports/GP%20Bullhound%20Research%20-%20Cryptocurrencies%20-%202018.pdf