Secure storage

Hello everyone, recently I have bought some Ethereum and wanted to buy more but I cant bring myself to trust these exchange platforms to keep them there.
So I researched about it and the best way to store your crypto is through "cold wallets"
But with cold storages you have types either a keystore file or mnemonic phrase and "hardware wallets"
I know hardware wallets are a good option but I found out there is fraud within that category as well.
My current way of saving is through paper wallet mnemonic phrase that I open only through Tails operating system which I've installed on a USB and I boot that whenever I want to do any transactions.
I want to keep my crypto for the long term.
How can I make this even more secure? Is my way secure enough?
submitted by /u/KARD0
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