What is the dumbest crypto concept you heard of that later went on to be a gold mine?

For me, #1 is easily Doge coin. I saw a segment on The Daily Show about meme coins and it featured Doge. I just did a Google search about it looks like this segment aired December 16th~, 2017. The price of Doge at that time was around .005 per coin. I remember watching this segment thinking that this idea is so stupid that I bet it takes off, especially after being on a big show like The Daily Show. I ultimately never bought any because after checking the main exchanges, I had no idea how to even purchase this coin. So I passed. I was right to an extent, The Daily Show did cause a nice little run for it, and it went on to 2x.

In retrospect, even if I had bought I know I wouldn’t have held through the big dip that followed, let alone for the next 3 years before Elon came along to pump the hell out of the price.

What other ideas have people heard of in the Crypto space that sound so absurd but later on became a juggernaut in market cap?