Yes if you want to invest some on those coins. Both if coins also are at top 20 altcoins, so i think it's good choice to buy and hold some of them especially with cheap price right now.
in my opinion, you better invest altcoin or your money on promising altcoin and so invest does not specify a certain amount, let alone you invest on TRX and Cardano which I think altcoin is not good, but it is up to you I just think you better invest in a promising altcoin
I believe you don't know about TRX and Cardano