I only ever had liability insurance because for years my cars were all worth $200-400 then I splurged for the $1500 one that I had for 12 years. The math wouldn't even come close to working out on this one as far as losses, because it's an expensive vehicle, but if you're insurance is going through the roof and you're going to lose out on potential long term discounts from lack of claims/incidents, you could just cut your losses and buy a $3000 Corolla or something, or even a bicycle!
I actually did commute to my 2 jobs on my mountain bike for a little bit, while sharing my 83 Caprice with my deadbeat ex girlfriend. Times were tough.