Inflation bugs definitely are possible. However, there's a lot of work that goes into making sure that does not occur. And at least as of now, we don't seem to have had one because if we did, we would see much higher Monero inflation because somebody with an inflation rate bug is going to print themselves more Monero. And so far, in the 10 years Monero has existed, we've not seen evidence of such.
Discussion
Not if they are smart and cash out slowly. Or just spend the monero on the things, or donate.
But your fighting human nature and human nature is generally going to be as greedy as possible. So donations would be unlikely and cashing out slowly and or buying products slowly enough not to crash the price would also be unlikely.
The fact that it is possible however means capital will never flow into monero in large quantities.
We will just have to agree to disagree on that one.