All projects make unrealistic claims about TPS, security and best decentralisation consensus but on practical purposes
1> which is the fastest, most secured and decentralised blockchain already working ( i.e mainnet already running)
2> which is the most fastest, most secured and decentralised blockchain whose mainnet will be releasing in 2019 and how they compare to other competitors
3> which is the most promising upcoming project in the space which has solid team and don't claim unrealistic expectations
4> what is theoritacal maximum tps , best consensus and crypto security can be achieved according to technology available today and within next 4-5 years
Expecting answers from researchers , enthusiast , nakamoto son and all those who like to scratch there heads.
According to Yahoo Finance, Waves Platform is World's fastest public blockchain.
https://finance.yahoo.com/news/enterprise-blockchain-gets-boost-investors-110000262.html
It's open source. Mainnet since 2016. Token creation, DEX, Rich API, Smart Contracts and
decentralised.
Lot's of other platforms claim TPS but Waves has 100TPs real world verified on nodes spread across the globe. With bulk transfer that figure rises to 10K TPs.
Theoretical maximum for WavesNG protocol is 1K TP/s.
As for security, code was audited by 3rd parties and benefits from core and user security updates on a regular basis.
https://wavesplatform.com