I totally agree with you, but in addition to what you have said, in as much as the need for additional sources of income can't be overemphasized as far as this discussion is concerned it is also important to note that the primary essence of any income should be for any potential investments that would yield more profits that would also take care of every other family needs, this way the chances of going through financial pressure as a result of the needs of the family could be reduced to barest minimal thereby keeping you anticipating for more investment opportunities.
Different uncertain circumstances can hinder one from having numerous source of income but if one is in a better situation whereby they're fit or healthy enough to have numerous source of income then the better for such folks cause more source of income means more discretionary for investment and more funds to take care of other expenses too and more discretionary means a higher rate of accumulation to yield more profits, that's why when an investor has held for so many years, many about a decade or so it would be wise for the person to take some profits and create another source of income, maybe a business that would generate more income and discretionary to accumulate more Bitcoin and add value to their portfolio.