Which hardware wallet to choose? What wallet have you got? Which one is secure? What altcoins can be allocated there?
I personally use Ledger Nano S, I am quite satisfied with, never had experience with Trezor but they are almost the same I suppose, you can store about 5-6 coins at the same time on your pc, but Ledger in general supports about 20-25 coins if I am not mistaken, you better visit their website and scroll it down, you will see. Also check their new Ledger Blue, I am considering of buying it also.