How much liquidity should I have in my financial portfolio to ensure I can meet unforeseen obligations while simultaneously seizing investment opportunities as they arise? What metrics should I consider when determining this liquidity threshold? Is it prudent to maintain a larger cash reserve in turbulent economic climates, or is that merely an invitation to stagnation in terms of investment growth? Furthermore, how do variables such as personal circumstances, income volatility, and life stage interplay with liquidity needs? Should my liquidity strategy evolve as my financial landscape shifts, reflecting changes in cash flow, liabilities, or even investment goals? As I ponder these queries, how do experts typically assess the delicate balance between liquidity and profitability? Do they employ specific ratios, or is it a more intuitive approach grounded in experience? Ultimately, how does one arrive at an optimal liquidity level that is both sufficient for emergencies and conducive to long-term financial health?