1031 exchange or pocket the gains?

[John Lee]

Hello BP community:

This is my first post so bear with me. 

I have done REI in Dallas for 5 years and I am currently selling a duplex netting over 100k having held the property for 3 years. In this current RE market (especially in DFW) should one pocket the money and take the capital gains hit, or 1031 exchange to a larger MF (4+)?

Thanks for y'alls input.