I said what on the thread that you trimmed 
security...
I though you meant one particular method of doing 100k tps was insecure, not the mere fact of achieving that rate. security...Can you explain what about higher transaction rates inherently makes the blockchain less secure?
You probably didnt read what I said about pettycoin, nor the 1hr video where Rusty Russel explains it at a conference.
It is the particular approach to sharding that makes it less secure, to reduce bandwidth. He proposes to shard it 100 ways and have each node only validate two shards, but mine all 100 via (the other 98 blind assuming the other miners are not cheating, they have a way to prove fraud, so long as no one succeeds to jam them)
Not directly less secure, but indirectly Bitcoin security also relies on decentralisation and that'd be a 15 GB block, and not many people have enough bandwidth to do that. (And sharding it is also less secure).
Snarks could do something but we cant rely on this yet IMO and I am not sure if they're fast enough to keep up computationally.
Quote from: JustusRanvier
Seems he does not understand what is "100k TPS".
100,000 transactions * 260 bytes * 60 seconds * 60 minutes * 24 hours = 2 246 400 000 000 bytes per day = 2.25 TB / day
Yes, I can do math.100,000 transactions * 260 bytes * 60 seconds * 60 minutes * 24 hours = 2 246 400 000 000 bytes per day = 2.25 TB / day
What's your point?
That if your home computer had to do 2.25TB/day down to be a full node you might not be able to do it, which is a centralising factor.
Adam