How to Buy Unit 00 - Rei(REI)

If you want to keep and hold Unit 00 - Rei(REI) for the long term and do not plan to sell them, security may be the first thing you should consider. Although keeping them in most of the top exchanges' wallets nowadays is safer than before, with the development of security techniques, however, because of the very nature of the wallets in exchanges, they will be always online( so-called "hot wallet"), it is possible of being a hack. What's more, the exchanges shut down may cause the loss of your fund. So the safest way of storing your coins or tokens is always putting them into "Cold Wallets", it is the wallet that is totally offline. There are two types of cold wallets:

• Paper wallet: It is simply formed by using a program to randomly generate a public and private key offline and you can print them on a piece of paper, which you then store and save in a secure place. The keys are printed in the form of QR codes which you can scan in the future for all your transactions. 
• Hardware cold wallet: Hardware wallets are physical devices where you can store your cryptocurrency. Your crypto addresses and keys can be kept in a USB drive device, and only the person who possesses the USB drive can access the assets. 

Nowadays, most people prefer to use hardware cold wallets, if you want to store a large number of coins or tokens, you can choose to use a hardware cold wallet to store your assets.