Purchased a domain with lots of backlinks - will it improve SEO?

I have a new website with a domain (abc.com) which obviously very low ranking on search engines at the moment.

I've also just purchased an expired similar domain (abc1.com) which has a birth year of 2005 and around 2000 backlinks.

Aesthetically my preference is to keep abc.com however I assume there is a lot of SEO value in the abc1.com domain?

Want to get peoples opinions of the following options?

1. redirect abc1.com to abc.com (abc as the primary domain, is there any added SEO benefit?)
2. change abc1 to the primary domain (any drawbacks?) and then use 'abc' as a redirect to 'abc1' on instagram/facebook etc.

Would love some help on this! Thanks!

submitted by /u/dovy22
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