Having a mix of both offline and online income streams can provide some diversification of income sources and potentially help individuals mitigate the risks associated with relying on a single income stream. The exact percentage split between offline and online income that is best for survival may depend on a variety of factors, such as the individual's skills, available opportunities, and personal circumstances. It's important to carefully evaluate the income-generating opportunities available and consider the potential risks and benefits of each before deciding on the best income split.