Print it in a paper but the paper and the printer you should use is not that advanced that stores data that can be collected by a hacker it must be a simple laser type printer and a paper tht is not easily disintegrated, and if you can you can also put a scratch sticker on the keys so you can know of someone is peeking on it and if possible you should put it in a vault of safe
Bitcoin crypto currency become most popular. There are several ways to store Bitcoin in your offline wallet including paper wallets, hardware wallets, etc. You can download the famous paper wallet generator from GitHub and move it to an offline PC and create a paper wallet to store your funds offline. In addition, hardware wallets are another more flexible way to use. And this is a safer way so that others will not know about the Bitcoin we have. Thanks