What kind of coin do you want to keep? In my experience, now most of the coins can be kept in a myetherwallet. But you have to specify the type of coin then I can advise you
Erc20 tokens mate not a coin or altcoin.. Mostly if OP wants to hold coins he can hold it in a certain exchange or trading site if possible pick the most reputable one OP. Legder nano can only take so little coin so if you pick ledger you must have bulk deal on one's coin usually some coin Makers have their own wallet like blockchain.