Yeah? Well I could open my own store at this point with what I have.
Just keep getting more. I had 250,000 rounds that was all personal (not in company inventory) at my highest point, 1/2 of that being .22 (since I was in my early 20s I always bought 1 brick of what I was going to shoot, and another to store so far as .22 goes). You can never have enough, it'll never lose its value, and in the future it could be number 4 on the list after water/food/shelter in terms of a useful commodity. I used to collect a LOT of silver and a fair bit of gold, but in recent years decided that despite making a lot on my gold, and silver being inexpensive to invest in, ammunition is and will be a much more useful thing to have to trade/barter with.