Let your imagination run ... wild.
I'll be a little more candid on my NNVC investment this year. I'm actually up near 300%, have my basis back, which is funding other investments, and still have twice the value in NNVC as I started the year with. I feel safe. I sleep well at night.
Since you sound concerned, I have a diversified set of portfolios. I also have some play money, which works pretty hard. I enjoy what I do.
Let's see, if PG, INTC, and IBM are safe stocks; then, I feel comfortable saying NNVC is relatively safe. Got to admit though, you did pick some solid stocks as examples for safe. But even these stalwarts have had major whoopdedoos in price over the years, and they have had their naysayers from time to time. Just like NNVC, I would not want any one of these companies as a stand a lone portfolio of one stock.
I am a strong proponent of having balanced portfolios of investments. NNVC fits in nicely with other investments I own.
Enough said.