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?)
I think the best competitors of Ethereum is in the top 10 altcoins because those in the top 10 altcoins are trying to get the crown to be the king of the altcoins, all coins have the goal to be tha top 1. So, that's i can say for now.