Hey guys Bart is here to explain! The joke here is that when we read the first line in the meme "got a PS5 for my little brother" then we think that this person bought PS5 as a gift for their brother that they were a very good and loving sibling. However, the next line says "Best trade I ever did" which tells that they didn't actually buy a PS5 for the brother, but instead sold their brother in return for a PS5 that they actually did a trade deal and sold their own brother, which showed that they weren't actually nice at all. Then the lower portion shows them saying "I was a business man... doing business" in clearance that they think they didn't do anything wrong but did a good business deal by selling their brother who probably would have been useless for them.
And if you’ve read this far, you might as well follow! I explain memes like this all the time :) @BartExplains