People tried to gain influence over the Bitcoin network in the past and they never succeded. Its much like the power of the Queen in United Kingdom. Theoretically she could overthrown the government, but in practice that will never happen.
Several Bitcoin mining pools tried to attack the network in the past, but the majority of their hashpower vanished and new hashpower appeared to protect the network.
The fact that Bitcoin was able to sustain security for 12 years makes it so valuable (especially because the incentive to take over is worth so much (market cap of $0.7T).
Ethereum's new PoS might be better in the future, however we are still many years away from properly verifing that. However I don't think it is possible to theoretically design a system that is secure and cheap to sustain at the same time. I believe security comes from expensivness (miners energy waste and slow transactions).
Several Bitcoin mining pools tried to attack the network in the past, but the majority of their hashpower vanished and new hashpower appeared to protect the network.
The fact that Bitcoin was able to sustain security for 12 years makes it so valuable (especially because the incentive to take over is worth so much (market cap of $0.7T).
Ethereum's new PoS might be better in the future, however we are still many years away from properly verifing that. However I don't think it is possible to theoretically design a system that is secure and cheap to sustain at the same time. I believe security comes from expensivness (miners energy waste and slow transactions).