You are talking here about trying to make a profit from investing in Bitcoin through long-term cold storage. Yes, this is the way that everyone imagines that they can make a profit through it, even if they do not understand the ABCs of the blockchain and how the Bitcoin system works. In fact, there are other people who benefit from Bitcoin as an electronic payment gateway. This system helped them launch their own businesses and achieve benefits from selling services online while ensuring the ease of making payments without the need to deal with banks and classic payment systems.
This can be very misleading and confusing.
I think it is more easier to understand by saying "Make profit from long term investing in Bitcoin", that's it. Investment in long term will help you to get profit with Bitcoin.
If you want to say more about storage method, and importance of cold storage method, talk about it separatedly will avoid misleading meaning in your message. Hardware wallets are good to use but buy them and use them properly too.
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[GUIDE] How to buy a Hardware Wallet the right way