I cannot store many altcoins with trezor or ledger nano s.what is the solution to store coins for long term that are not supported to trezor or ledger?
If the altcoin you want to hold or store for long term investment is not supported in your trezor or ledger nano s. better to use the official wallet for that specific cryptocurrency for better security of your coins but you will have to download the whole blockchain with that so you can also use multi asset wallet as an alternative. i will recommend using coinomi, jaxx or exodus.