it would likely crash the value of Bitcoin, making Ethereum the new number one cryptocurrency.
So far each time bitcoin had dropped, altcoins like ethereum get annihilator without recovering.
For example back in 2017 bitcoin was at $20k and ethereum at 0.15
BTC then bitcoin crashed to $3k and ethereum got destroyed by dumping down to 0.01
BTC.
Today bitcoin is back up to $20k and past that to almost $70k while ethereum is about 0.04
BTC[...]
At the end of the day with or without bitcoin we all know that ethereum is useless. Its only utility is for junk creation (ICO, IEO, STO, NFT, etc.) that have no usages in the real world.
It also has unlimited supply and a mutable blockchain with so many security flaws.
I believe that you are vastly underestimating Ethereum. The value of Ethereum is not 4% of Bitcoin's. It is currently 32%, according to
https://bitinfocharts.com.
And regarding all the supposed security flaws of Ethereum's protocol that you mention, this also shows that there are quite a lot of people who disagrees with you and believes it to be secure. However, I would love to hear more about what you believe those security to be? This sounds quite interesting.
You can't 51% attack with money, you'll need hardware. There is no $6-$20 billion worth of hardware for sale!
You can't also pay for it with market cap, they'll need to first own that much ether then dump it to get the money which would crash the price of this shitcoin and won't give them nearly as much as tens of millions let alone billions!
[...]
A miner is running a business and has made a significant investment. Why would a businessman kill his own business by attacking the very thing that is making them profit?
Yes, this is already taken into account in the estimated price of the attack.