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 cardano and ethereum is ethereum. Cardano will not able to over take ethereum in any days. If cardano develops itself a lot in the next five years and strengthens its ecosystem, meanwhile Ethereum will develop itself a lot more. It's not that Ethereum won't think of their own development or that they won't think of something new for their blockchain. Ethereum is at least 5 years ahead of cardano. So cardano will never overtake ethereum in any daysCardano will be like what other smartcontract platform is. NEO, WAVES, or EOS were used by a few developers with few projects on it. Still fighting for its existence and traded on exchanges. The ones that hold them though make money out of it for staking all the time and in the bear market, it's usually the first that will be dumped because stakers of ADA got their ADA for free.
They have thier own market and community so they are completely separate from the BTC community but many of us have some ADA though. I recently bought some just so I can also stake them.