Preparing for a financial crisis is not easy. You never know what kind of emergencies lie ahead. And being prepared for all of them is impossible.
The best we can do is take all the scenarios into account (kind of like Dr. Strange) and put aside some money on a regular basis for these unprecedented emergencies.
The key is consistency.
However, money that you put in a safe or in bank continually loses its value. So it's better to invest at least 70% of the amount into something you're good at: business, stocks, SIPs, mutual funds, etc.
Once you start gaining profits more than your active income, and have the money to put aside without having to cut back on your daily expenditure, that's when you might be moving in the right direction to financial security.
And even then, don't stop investing and earning passive income.
I shared my strategy because it's something I learnt from someone else and thought might be helpful for others too.