Its going to be safe if you only have a good and secure wallet. Instead of bank you should choose to invest it in Crypto since Bank is potential for inflation or the money you store in Bank losses its purchasing power over time. When investing in Crypto it is essential to choose a wallet, and basically the most secure and safe wallet would be an opensource wallet. Investment would be more effective if you'll be diversfying your investment or buying different kind of coin. To organize your investment, you may choose to have a multi wallet.
You may check out HODLER wallet, this has all the feature I am telling. It is a open source multi wallet that offers the most effective way to hold investment in the most secure and safest way.