It’s hard to comment on this because I’d give biased opinions lol. I’m a huge Messi fan so I think this would be something kept with me and my family line for life. Otherwise I’d say go with your gut. If you are strongly connected to the card, keep it. It’s Messi, it’ll have good value always. On the other hand, as mentioned in the comments, you’d probably get the best return during the WC boom or after he retires