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.
1- Waves i think. Maybe some of them achieved more tps than waves but their chains are not intensive enough, they are practically meaningless.
2-
Credits, they achievednearly 1.3M TPS in Internal tests.
3- I think Vostok is the most promising project in 2019. It will be secure as Waves and Fast as Waves and Private!
4- Theoretically there is no limit. New software comes out, and perhaps even higher speeds are achieved. But how much of these speeds we will need, this speed race will not know how far we will go. I think this speed race will end after a certain point.