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?)
There are so many competitors of Ethereum in the cryptocurrency space, some of them include Cybermiles, NEO, Cardano EOS, Nexty etc, however the most outstanding one I know recently is the Nexty blockchain which has been able to solve the problem of instant transfer of payment in the blockchain. Check website here:
https://nexty.io