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. That should be zilliqa as the fastest blockchain in this time based on the main net which has been fully working.
2. I bet on some platforms like credit, quarkchain. About the decentralized needs to get the more tests.
3. bittorrent, files.fm and the last should be elixxir.
4. There will be no maximum TPS but there were limited resources. Not of all the nodes have the same statistic. any consensus has its own advantages and disadvantages.