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?)
Cardano could possibly beat ethereum in terms of its features but it is still has long way for development. Tron could possibly beat ethereum, but the big bad giant here is EOS,. we will see the next couple of months, who will show characteristics to beat ethereum.