Got lucky with John Deere

Many years ago during the 2015 to 2016 China slowdown when most stocks were down, including Tech, I thought we were on the verge of another dotcom bubble 2.0. I also wanted to buy something that had to do with the real economy instead of tech and had Deere, Caterpillar, and Boeing on a watchlist. I eventually got rid of Boeing and Caterpillar to hedge against being too deep in industrials. If you asked me what caused me to pull the trigger on a large chunk of Deere in August 2016, it would make your eyes roll and it would make any financial advisor fall on the ground with a heart attack. The Warriors had come back from a 3-1 deficit and the Western Conference finals and the Cavaliers then came back from a 3-1 deficit to win the NBA finals. Then, Portugal won the euro 2016 when they were not favored at all. Later on, I saw this news segment of Trump talking to farmers and something clicked in my mind that this was a strange year and that he wanted to give them some money if he won. If he won, the Tech bubble would burst so it was better to buy industrial stocks, especially John Deere because the farmers were going to buy more equipment with the subsidies. I did absolutely no financial, company, or sector analysis at all. This was just a cockamamie theory. And then, I got busy and totally forgot about it and one fine day I noticed I had gained over 100% in that stock a few years later. I now sit on an almost a 600% gain. I bought this in my IRA and it is the largest holding within my IRA consisting of 60% of that particular IRA account (I have many IRA accounts). What should I do with it? It looks like a good long-term, “never sell“ type of a stock, and arable land is always a problem, but the population is also declining all over the world.