obviously it would take a lot of effort/money that probably only a government could pull off.
Right now you dont need a government, only a couple of tens of millions of dollars.
To put that in perspective, only in the USA right now, there are
1 million people that have a net worth of more than
10 million dollars. If a handfull of those wanted to harm bitcoin, they could.
Also the
supercomputer argument is a
known fallacy. Its a catchy phrase but does not make bitcoin less vulnerable to brute hashing attacks for the moment. The supercomputer argument is debunked in the thread above.
I'd rather see the number of Americans with LIQUIDITY in excess of $10 million. Net worth factors in long term, illiquid assets. I get your point though, I just think you're using the wrong metric.