Which are the best competitors to Ethereum, and why do you think so?
(I know on top of my head that Cardano and IOTA try to challenge Ethereum,
although they still haven't proved much from my understanding?)
Number 1 and still undisputed is Bitcoin, no altcoins can still stop Bitcoin even though it is on a steep decline. What I see is Ethereum can be a number 1 altcoin but not this year maybe after 2 years and if the value of Bitcoin still continues to go down. We are also looking on the rise of altcoins.