Unpopular popular opinion: the money we use nowadays is made up of IOUs (I owe you). The money is created by central banks. Central banks don’t get money from anything; instead, they create money. The money then goes to investors, government and corporatios, and that’s why the rich become richer, and I, as a poor person, become poorer.
Well, if Trump manages to tank the dollar as a reserve currency and we experience hyperinflation (fairly likely at this point), you’ll have every opportunity to go back to a barter system because those IOUs will be effectively worthless.
Start growing a community garden today.