Ultimately you may still be able to obtain secured loans but you may have trouble with unsecured. A 720 credit score used to be the score you needed to qualify for anything and obtain the best loan terms. In recent months that has transitioned to a score of 740 with several lending outfits.
Most of the mortgage lenders add adjustments to loans with a credit score under 740. The fine print on most 0% car ads says you need a 730 or a 740 credit score to qualify.
Also, most mortgage loans have already transitioned to a minimum score of 620 (Very few loans for people with lower credit scores however some are still available).
However, 2 of my lenders increased their credit score to a minimum of 660.
I would say a 660 is Fair. You will obtain some credit but not all and your terms will be worse than in the past. You should work on building the score up.
I am posting a few articles that cover some detail of my response. Feel free to review the information and ask questions.