What would happen if someone, lets say Bob. Goes out and says "We got a problem. Previous governments have been doing too much QE. Inflation is going wild. We will now adopt Bitcoin as legal tender."
Would Bob get elected? Or would majority of people not like Bob?
LOL.. such policies will make Bob a Libertarian. And Libertarian candidates usually receive around 2%-3% of the votes in the POTUS elections (back in 2020, Jo Jorgensen received 1.18%). So that gives you an idea how practical it is to make claims such as this one. Democrat and Republican parties are solidly behind the national currency (i.e the US Dollar). Trump is believed to be somewhat pro-Bitcoin, but even he won't approve what you have posted. So my prediction is that Bob would receive some 2% of the vote and zero electoral college votes.
Actually Trump said he doesn't like bitcoin and that it looks like a fraudulent scheme. He said bitcoin prejudices dollar and he totally supports dollar currency as the main world's currency.
But you are right about the votes percentage. A bitcoin proposal isn't enough to push a candidate up in an election. What really matters in a political campaign is money. If the candidate has money plus influence to buy support from another politicians and from the people he wins, that is how it works. Proposals play a little role in political disputes. They are just smoke screen.