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I believe that having high income will mean financial security. It does not guarantee it because you might end up losing all your salary but at least you now have the capacity to make sure your money is safe. Which is the first step anyway. You have to have money to secure in the first place before you even try to find a way to secure it.
Everyone will certainly look for ways to secure their money once they have it, and this also applies to those who already own Bitcoin. Some people will certainly look for ways to store Bitcoin safely after purchasing it, although some will also research this before owning Bitcoin. But when it comes to money, of course, most people will learn about security after they have money in their pockets or wallets.
And regarding having a high income, that's geared towards businesses and jobs that can generate consistent income without interruption, so it only guarantees income, not security. Because security is an absolute requirement that applies to something specific, like assets or money, as we're discussing now.