Why not learn some other not-so popular/known/played concertos instead?
Scriabin's F#minor, Prokofiev's 4th and 5th (this is my second favorite

), Barber's concerto, Schoenberg's, etc.? or 21th century concertos as well, there's a lot that's not being sufficiently played.
You already have big works on your repertoire that are great but super common, I don't think you necessarily need to play Tchaikovsky's 1st, although it would be great you learn it and have it in your repertoire! but I would prefer to buy a ticket to hear another less known concerto, fortunately you know the Rach 4.