Is this news or negligible?

[Vincent R.]

"ARMs have doubled to 10% of mortgages since all time lows in January of 4%" 

https://www.cbsnews.com/news/m...

The article claims (rightfully) that ARMs contributed to the 2008 crash. But... 10%

Say half of those ARMs default in 5 years... that's 5% of all mortgages. So 1 in 20 or 5 in 100. Is that enough evidence towards these bubble indicators that keep popping up? 

- 12+ years of appreciation, 

- ATH prices + rising interest rates, affordability index

(https://mortgageorb.com/afford...),

- foreclosures (similar to ARMs, has increased, but still near historic lows 

https://www.marketwatch.com/pi...)

In light of record levels of equity, inflation increasing housing "values", tighter Fannie/Freddie lending (although I've heard portfolio loans/commercial loans are lending with much looser requirements)....

We getting nervous or tricking ahead with buying?

PS - I'm small time and likely not going to have more downpayment money for 6+ months. Just curious about how people are feeling. Thanks!