The Ledger Nano S, released in 2016, is a well-recognized way of storing Bitcoins and alt coins in which all sensitive operations are isolated inside a PIN code protected hardware wallet within a State-of-the-art Secure Element. This is where all confidential data as well as access to the funds gets stored. Transactions here are also secured through a physical verification of sorts on an embedded screen with a simple press of a button.
There are three major hardware wallets which are available with a screen, the cheapest of whom is Nano S, and costs about $95. Coins can be held on a Ledger Nano S by keeping them in “cold storage” which is storing them offline to prevent hacking.
According to the Ledger site, so far 26 types of coins are accepted. They are, Bitcoin (BTC), the coin for holding which, this ledger was created, Bitcoin Cash (BCC), storing which was first made easy by this hardware wallet, and Dash (DASH) which has a solid team, great marketing, is most importantly a usable currency. Komodo (KMD), has been added recently to the list of coins that can be stored on the Ledger, along with Litecoin (LTC) which is known popularly as the “silver of cryptocurrencies”, and Ripple (XRP), which can be held in the ledger since mid 2017 and is now one of the best wallets for holding Ripple. Other than these, Ledger Nano S also accepts Stratis (STRAT), which is a strong and stable crypto coin with a great future, Zcash (ZEC), which is a privacy-based cryptocurrency. It’s a decent investment, and is loved by many, Ark, Bitcoin Gold, PoSW, ARK, Ubiq, Expanse (EXP), PIVX, Vertcoin, Viacoin, Stealthcoin (XST), NEO, Digibyte, Dogecoin, Ethereum (ETH), Ethereum Classic (ETC), Hcash, Qtum, and Stellar.
This ledger operates through Ledger Apps, which is it’s own Crypto wallet, and since all ledger apps are open source, everyone has access to the full source code if they want to contribute to its development.