> Could we just not prohibit lawmakers from investing in particular stocks
You're talking about HR 5106 [0] (aka the "Restore Trust in Congress Act"), currently being blocked by Republican House leadership, and actively facing a discharge position by the House rank and file (Republican included) to force a vote [1].
[0] https://www.congress.gov/119/bills/hr5106/BILLS-119hr5106ih....
[1] https://www.cbsnews.com/news/congress-stock-trading-ban-disc...
The de-facto leader of the Republican party is running blatant crypto scams from the White House and his supporters cheer him on.
I don't know where the Overton Window is today, but it's a long way from Jimmy Carter's peanut farm.
It's authored by a Republican congressman, and is a bipartisan flop, with only 100 total reps sponsoring. It's true that of those few who are sponsoring there are more Democrats, but overall most Democrats oppose which is also enough to block the bill, same as Republicans.
Source: https://www.govtrack.us/congress/bills/119/hr5106
It also blocks stock trading entirely for congressmen, which is dramatically different from what gp was suggesting.