If you live in central California it is worth to buy. It is $13,500 in rebates and credits for me. This makes the car about $25,000 and the depreciation doesn't hurt as bad. I have never leased, I always pay off cars within three years and enjoy time with no car payments.
The rest of California I would consider a lease, but only at payments around $300 a month and you are able to get the $2500 state rebate. BTW, don't expect the state rebate for about 4 months. I was finally approved with all paperwork submitted perfectly the first time after 5 weeks. However, I drive my car about 20,000 miles a year and would get killed on a lease. To be honest if you don't put much mileage on a vehicle you should be looking at a Leaf or a Volt. The Bolt is perfect for my 130 mile commute.
If you want a new car every three years a lease will be your best bet. Some people I know do this and love having new cars. Just do what makes you happy and what you can afford. I wouldn't worry much about the Bolt being outdated any time soon. 240 mile range can only be beat right now by cars that are $80,000. The Model 3 won't be able to be purchased until late 2018 or 2019 depending how production goes. If you didn't put a reserve on a Model 3 it might be 2020 before you can get your hands on one. The Nissan Leaf now knows there car has to get over 200 mile range, which I think may delay production for them. It was supposed to be out this year, but now it looks like mid 2018. The Bolt is years ahead of other cars and wont depreciate as much as you think in three years.