Do you think cardano will over take ethereum in terms of tech with voltaire being worked on this year. Along with erc20 converter for easy conversion to cardano via ethereum. 
Cardano is a good technology as well but I think ETH will remain the first option of many and will stay as the top altcoins. This two has been competing since the launch of Cardano but ADA cant handle the competition that much since it needs to surpass other altcoins first before reaching the level of ETH. Good updates can be a big help, I guess ADA should not aim to replace ETH anymore better to focus on its own technology and allows it to stays in the competition.