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?)
Nothing, even though for now I see the etherium token dropping, but I'm sure for the future everything will return to normal and provide benefits.
So, I think for now there is nothing that can match etherium tokens, at least until the next 3-5 years.